Large Cardboard Boxes (18"+)

IN STOCK ECT-32 single wall kraft corrugated boxes designed for reliable mid-weight shipping and storage. 23x17x12" dimensions deliver optimal freight efficiency and stacking performance. Sold in bundles of 10–stock what you need, reduce per-unit costs.
Boxes - Corrugated

23x17x12 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 231712

23 x 17 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$34.46 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 22" × 18" × 16" deliver reliable single-wall strength for mid-weight industrial shipments and warehouse storage. Sold in bundles of 15 for volume savings and freight efficiency. Recyclable kraft construction reduces your sustainability footprint.
Boxes - Corrugated

22x18x16 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 221816

22 x 18 x 16 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$56.35 / BUNDLE
IN STOCK Industrial-grade 22x18x12" corrugated boxes built from ECT-32 kraft material–the standard for reliable shipping, stacking, and storage. This 15-pack bundle reduces per-unit costs while delivering consistent performance for warehouse operations. Recyclable construction supports sustainability goals without sacrificing durability.
Boxes - Corrugated

22x18x12 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 221812

22 x 18 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$49.64 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 22x18x10" dimensions deliver reliable stacking performance and protection for mid-sized shipments. Each bundle includes 20 flat-packed cartons that save warehouse storage space while meeting industry standards for freight efficiency. Perfect for fulfillment centers managing high-volume operations.
Boxes - Corrugated

22x18x10 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 221810

22 x 18 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$97.45 / BUNDLE
IN STOCK Heavy-duty ECT-32 single-wall corrugated cartons sized 22" x 18" x 8" for mid-sized freight loads. Sold as a bundle of 20 kraft boxes, these standard-strength shipping cartons deliver reliable stacking performance and cost-effective volume protection. Recyclable kraft construction built for warehouse operations and fulfillment demands.
Boxes - Corrugated

22x18x8 ECT-32 Kraft Corrugated Cartons 20-Pack

PN: 22188

22 x 18 x 8 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$58.99 / BUNDLE
IN STOCK Optimize your fulfillment with these ECT-32 kraft corrugated boxes in a compact 22" x 18" x 6" shallow depth design. Perfect for apparel, books, frames, and artwork that don't require deep cartons. Ships flat to maximize warehouse storage and cut freight costs–bundle of 20 ready to go.
Boxes - Corrugated

22x18x6 ECT-32 Kraft Corrugated Boxes 20-Pack

PN: 22186

22 x 18 x 6 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$55.77 / BUNDLE
IN STOCK Professional-grade 20x20x18 corrugated boxes built from ECT-32 kraft material deliver reliable stacking strength and freight efficiency for high-volume warehouses. Sold in bundles of 10, these heavy-duty shipping cartons maximize pallet density while maintaining superior crush resistance. Cost-effective, recyclable packaging for fulfillment centers handling mid-to-heavy loads.
Boxes - Corrugated

20x20x18 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 202018

20 x 20 x 18 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$40.59 / BUNDLE
IN STOCK Professional-grade 20x20x16 corrugated shipping boxes manufactured from ECT-32 kraft single-wall material. Bundle of 15 boxes delivers proven stacking performance and freight efficiency for warehouse managers and fulfillment centers. Recyclable cardboard construction reduces disposal costs.
Boxes - Corrugated

20x20x16 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 202016

20 x 20 x 16 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$58.42 / BUNDLE
IN STOCK Professional-grade 20x20x15" corrugated shipping boxes built from ECT-32 single-wall kraft material for reliable stacking and freight efficiency. Each bundle contains 20 boxes–ideal for mid-volume warehouse and fulfillment operations. Recyclable, cost-effective, and engineered to handle standard distribution demands.
Boxes - Corrugated

20x20x15 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 202015

20 x 20 x 15 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$76.59 / BUNDLE
IN STOCK Industrial-grade 20x20x14 corrugated shipping boxes engineered for reliable mid-size product protection. ECT-32 kraft construction delivers proven stacking strength and crush resistance. Bundle of 15 flat-packed cartons ships efficiently, reducing freight costs and warehouse storage footprint.
Boxes - Corrugated

20x20x14 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 202014

20 x 20 x 14 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$58.96 / BUNDLE
IN STOCK Maximize your fulfillment efficiency with these ECT-44 heavy-duty corrugated boxes–40% stronger than standard shipping containers for superior protection and stacking performance. Each 20x20x12 kraft carton is engineered for high-volume operations, sold flat in bundles of 10 to reduce freight costs and storage footprint.
Boxes - Corrugated

20x20x12 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 10-Pack

PN: HD202012

20 x 20 x 12 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$50.43 / BUNDLE
IN STOCK Reduce SKU complexity and cut parcel shipping costs with these pre-scored 20x20x12 corrugated boxes. Fold to 4", 6", 8", or 12" heights–no carton sizer needed. ECT-32 kraft construction delivers reliable stacking strength while consolidating multiple box sizes into one inventory item. Sold in bundles of 15.
Boxes - Corrugated

20x20x12 ECT-32 Kraft Adjustable Multi-Depth Corrugated Shipping Boxes 15-Pack

PN: MD202012

20 x 20 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$61.55 / BUNDLE
IN STOCK Standard-strength ECT-32 kraft corrugated boxes sized 20" x 20" x 12" for reliable PC tower and mid-size product shipping. Bundle of 15 ships flat for maximum freight efficiency and storage savings. Proven performance for warehouse, fulfillment, and e-commerce operations.
Boxes - Corrugated

20x20x12 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 202012

20 x 20 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$46.29 / BUNDLE
IN STOCK Industrial-grade 20x20x11 corrugated shipping boxes built from ECT-32 kraft material for reliable stacking and freight efficiency. This bundle includes 15 boxes–the standard choice for warehouse managers and fulfillment operations seeking cost-effective, recyclable packaging solutions without compromising durability.
Boxes - Corrugated

20x20x11 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 202011

20 x 20 x 11 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$55.91 / BUNDLE
IN STOCK Ship shallow products efficiently with these 20x20x8" ECT-32 kraft corrugated boxes. Bundle of 15 units ships flat to maximize storage and reduce freight costs. Ideal for apparel, books, artwork, and picture frames–all the protection you need without excess depth.
Boxes - Corrugated

20x20x8 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 20208

20 x 20 x 8 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$46.88 / BUNDLE
IN STOCK Ship shallow products efficiently with these 20x20x7 kraft corrugated boxes rated ECT-32 single wall construction. Ideal for apparel, books, frames, and artwork, this bundle of 15 arrives flat to minimize storage footprint and reduce inbound freight spend.
Boxes - Corrugated

20x20x7 ECT-32 Kraft Corrugated Shipping Boxes Single Wall 15-Pack

PN: 20207

20 x 20 x 7 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$67.36 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 20" × 20" × 6" deliver reliable single-wall protection for lightweight to mid-weight products. The shallow 6" depth minimizes dimensional weight charges and maximizes pallet density, reducing your per-unit freight costs. Ships flat in bundles of 15 to maximize your warehouse efficiency.
Boxes - Corrugated

20x20x6 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 20206

20 x 20 x 6 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$40.40 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 20x20x4" dimensions designed for shallow-depth products that require secure, stackable shipping. Ships flat in bundles of 10 to maximize storage efficiency and reduce freight costs. Ideal for apparel, books, picture frames, artwork, and mirrors.
Boxes - Corrugated

20x20x4 ECT-32 Kraft Corrugated Boxes 10-Pack

PN: 20204

20 x 20 x 4 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$26.06 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 20x20x2" dimensions–engineered for shallow products like apparel, books, and artwork. Ships flat in bundles of 20 to maximize storage efficiency and reduce freight costs. Reliable single-wall construction delivers proven stacking performance.
Boxes - Corrugated

20x20x2 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 20202

20 x 20 x 2 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$88.01 / BUNDLE
IN STOCK Ship tall items efficiently with our 4x4x36 corrugated boxes–ECT-32 kraft single wall construction delivers proven strength at competitive bulk pricing. End-loading design speeds packing operations. Bundle of 25 ships flat to maximize freight efficiency.
Boxes - Corrugated

4x4x36 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4436

4 x 4 x 36 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$40.68 / BUNDLE
IN STOCK Ship long and narrow items efficiently with our 32x8x8 ECT-32 kraft corrugated boxes. Wide lengthwise opening speeds packing for wine bottles, umbrellas, carpet rolls, and similar products. Sold and shipped flat in bundles of 25 for maximum freight efficiency and volume savings.
Boxes - Corrugated

32x8x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 3288

32 x 8 x 8 in ECT-32 Corrugated 25 PER BUNDLE
$44.63 / BUNDLE
IN STOCK ECT-32 single wall corrugated boxes sized 28" x 12" x 8" deliver reliable stacking strength for medium-weight shipments and storage. Ships and stores flat to reduce your warehouse footprint and freight costs. Sold in bundles of 25–ready to stock your fulfillment operation.
Boxes - Corrugated

28x12x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 28128

28 x 12 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$89.51 / BUNDLE
IN STOCK Industrial-grade ECT-48 double wall corrugated boxes designed for warehouse and fulfillment operations requiring maximum protection and stacking performance. These 24 x 16 x 16" kraft cartons feature superior burst strength and arrive flat for efficient storage and freight savings. Ships as a bundle of 10 units.
Boxes - Corrugated

24x16x16 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD241616DW

24 x 16 x 16 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$56.06 / BUNDLE
IN STOCK ECT-48 kraft double wall corrugated boxes engineered for maximum protection and stacking performance. These 24" x 16" x 12" shipping cartons deliver superior strength for fragile, heavy, or multi-SKU shipments. Sold in bundles of 10 and ship flat to minimize storage footprint and freight costs.
Boxes - Corrugated

24x16x12 ECT-48 Kraft Heavy-Duty Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD241612DW

24 x 16 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$76.82 / BUNDLE
IN STOCK Industrial-grade ECT-48 double wall corrugated boxes engineered for maximum protection and stacking performance. Each bundle includes 15 flat-shipped kraft cartons, reducing your storage footprint and freight costs while guaranteeing damage-free delivery of mid-weight to heavy merchandise.
Boxes - Corrugated

24x16x8 ECT-48 Double Wall Corrugated Boxes 15-Pack

PN: HD24168DW

24 x 16 x 8 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$102.70 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 24" x 16" x 6" dimensions–engineered for shallow product shipping with excellent stacking strength. Sold in bundles of 20 and ship flat to maximize storage efficiency and reduce inbound freight costs. Ideal for apparel, books, artwork, and picture frames.
Boxes - Corrugated

24x16x6 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 24166

24 x 16 x 6 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$48.96 / BUNDLE
IN STOCK Efficient 22x18x4 corrugated shipping boxes in ECT-32 kraft material designed for shallow merchandise and compact freight optimization. Bundle of 25 boxes ships flat to maximize your warehouse storage and reduce dimensional freight charges. Ideal for apparel, books, frames, and artwork shipments.
Boxes - Corrugated

22x18x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 22184

22 x 18 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$96.35 / BUNDLE
IN STOCK Heavy-duty ECT-44 single wall corrugated boxes built 40% stronger than standard shipping containers for superior stacking performance and load-bearing capacity. These 20x20x20" kraft cartons ship flat and bundle in quantities of 10, maximizing warehouse efficiency and freight savings. Trusted by fulfillment directors for demanding distribution environments.
Boxes - Corrugated

20x20x20 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 10-Pack

PN: HD202020

20 x 20 x 20 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$60.58 / BUNDLE
IN STOCK Reduce carton inventory and cut shipping costs with these 20x20x20 multi-depth corrugated boxes. Pre-scored kraft cardboard adjusts to multiple heights–no carton sizer needed. ECT-32 single wall construction delivers strength and reliability. Sold as a bundle of 10.
Boxes - Corrugated

20x20x20 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 10-Pack

PN: MD202020

20 x 20 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$47.66 / BUNDLE
IN STOCK ECT-32 kraft corrugated cube boxes in 20x20x20 dimensions–the industry-standard size for shipping round and cylindrical products with maximum stacking strength. Sold flat in convenient bundles of 10 for efficient warehouse storage and fast fulfillment operations.
Boxes - Corrugated

20x20x20 ECT-32 Kraft Corrugated Cube Shipping Box 10-Pack

PN: 202020

20 x 20 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$38.72 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes engineered for maximum protection and stacking performance. Each bundle includes 10 kraft cartons (20" x 20" x 16") that ship flat to reduce your storage footprint and freight costs. Ideal for fulfillment centers and warehouse managers shipping mid-weight to heavy products.
Boxes - Corrugated

20x20x16 ECT-48 Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD202016DW

20 x 20 x 16 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$67.47 / BUNDLE
IN STOCK Industrial-grade ECT-48 double wall corrugated boxes with built-in hand holes for efficient warehouse handling. 20" x 20" x 12" kraft cartons ship flat to maximize storage, stack reliably under load, and reduce freight costs. Sold as a bundle of 10 boxes.
Boxes - Corrugated

20x20x12 ECT-48 Double Wall Hand Hole Box 10-Pack

PN: HD202012DWHH

20 x 20 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$77.35 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated cartons engineered for maximum protection and stacking performance. Each 20" x 20" x 12" shipping box handles demanding warehouse conditions without compromise. Bundle of 10 units ships flat–save storage space and freight costs.
Boxes - Corrugated

20x20x12 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD202012DW

20 x 20 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$56.89 / BUNDLE
IN STOCK Protect high-value shipments with ECT-48 double wall corrugated construction rated for maximum stacking performance. These 20x20x10 kraft boxes deliver industrial-grade durability for warehouse, fulfillment, and logistics operations. Ships flat in bundles of 10 to maximize storage efficiency and reduce freight costs.
Boxes - Corrugated

20x20x10 ECT-48 Double Wall Corrugated Boxes 10-Pack

PN: HD202010DW

20 x 20 x 10 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$72.82 / BUNDLE
IN STOCK 10x10x30" Tall Corrugated Boxes ECT-32 Kraft - Bundle of 25
Boxes - Corrugated

10x10x30 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 101030

10 x 10 x 30 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$77.34 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 24" × 16" × 24" deliver reliable standard strength performance for mid-weight shipping and storage applications. Sold in bundles of 10, these recyclable cardboard shipping boxes reduce per-unit costs and freight waste. Ideal for warehouse managers and fulfillment operations managing volume shipments efficiently.
Boxes - Corrugated

24x16x24 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 241624

24 x 16 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$44.61 / BUNDLE
IN STOCK ECT-48 heavy-duty double wall corrugated boxes in 22x18x16" dimensions deliver superior protection and stacking performance for demanding warehouse operations. Kraft kraft construction resists crushing and punctures, while flat-ship bundling reduces storage footprint and freight costs by up to 40%. Sold in bundles of 10 cartons.
Boxes - Corrugated

22x18x16 ECT-48 Kraft Double Wall Corrugated Boxes 10-Pack

PN: HD221816DW

22 x 18 x 16 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$82.45 / BUNDLE
IN STOCK Heavy-duty 20x20x20 double wall corrugated boxes built from ECT-48 kraft material deliver superior stacking strength and protection for large shipments, monitor packaging, and demanding freight environments. Ships flat in bundles of 10 to maximize storage efficiency and reduce your packaging footprint. Ideal for warehouse managers seeking reliable, cost-effective bulk shipping cartons.
Boxes - Corrugated

20x20x20 ECT-48 Double Wall Corrugated Boxes 10-Pack

PN: HD202020DW

20 x 20 x 20 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$65.22 / BUNDLE
IN STOCK Heavy-duty ECT-44 corrugated cartons with pre-scored multi-depth design eliminate wasted space and reduce DIM weight penalties on UPS/FedEx shipments. Cut to multiple sizes without additional inventory. 40% stronger than standard shipping boxes–sold as bundle of 10 kraft cartons.
Boxes - Corrugated

20x20x20 ECT-44 Heavy-Duty Multi-Depth Corrugated Shipping Boxes 10-Pack

PN: MDHD202020

20 x 20 x 20 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$60.90 / BUNDLE
IN STOCK Durable ECT-32 white corrugated cube boxes sized 20x20x20" for maximum label visibility and professional shipment appearance. Same rugged single-wall construction as kraft alternatives–sold in convenient bundles of 10 for volume efficiency. Ideal for warehouse managers seeking unprinted corrugated cartons that maintain structural integrity under standard stacking loads.
Boxes - Corrugated

20x20x20 ECT-32 White Corrugated Shipping Boxes 10-Pack

PN: 202020W

20 x 20 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$64.09 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes sized 20" x 18" x 22" built for high-volume warehouses and fulfillment centers. Each bundle of 10 delivers proven stacking performance and freight efficiency without compromising durability. Recyclable kraft construction reduces your environmental footprint while maximizing storage density.
Boxes - Corrugated

20x18x22 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 201822

20 x 18 x 22 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$46.02 / BUNDLE
IN STOCK Industrial-grade 16x16x24" corrugated shipping boxes built from ECT-32 kraft material for reliable stacking and freight efficiency. Each bundle includes 20 boxes ready for immediate deployment in warehouse and fulfillment operations. Recyclable kraft construction reduces environmental impact while delivering the strength your operation demands.
Boxes - Corrugated

16x16x24 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 161624

16 x 16 x 24 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$72.37 / BUNDLE
IN STOCK ECT-32 kraft corrugated cartons engineered for shallow products–apparel, books, frames, and artwork. 26x15x7 dimensions minimize wasted space and freight costs. Ships flat in bundles of 20 for maximum storage efficiency.
Boxes - Corrugated

26x15x7 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 26157

26 x 15 x 7 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$54.62 / BUNDLE
IN STOCK ECT-48 double wall corrugated boxes engineered for warehouse efficiency and maximum protection. Integrated hand holes eliminate manual handling strain while kraft construction delivers industry-leading stacking strength and crush resistance. Bundle of 10 boxes optimizes freight efficiency and reduces per-unit costs.
Boxes - Corrugated

20x20x20 ECT-48 Double Wall Corrugated Shipping Boxes with Hand Holes 10-Pack

PN: HD202020DWHH

20 x 20 x 20 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$103.72 / BUNDLE
IN STOCK ECT-71 heavy-duty double wall corrugated boxes engineered for maximum protection and stacking performance. These 20x20x20" kraft cartons deliver 140# burst strength capacity–ideal for high-volume distribution centers and warehouses shipping heavy or fragile goods. Sold in bundles of 10 for bulk efficiency.
Boxes - Corrugated

20x20x20 ECT-71 Double Wall Boxes 10-Pack

PN: HD202020HDDW

20 x 20 x 20 in ECT-71 Double Wall Corrugated 10 PER BUNDLE
$218.32 / BUNDLE
IN STOCK Adjust from 4" to 30" height to fit tall and irregularly shaped items with ECT-32 kraft corrugated strength. These telescoping inner boxes feature a full overlap bottom for superior stacking performance in your warehouse. Sold in bundles of 10–pair with T37430OUTER to complete the set.
Boxes - Corrugated

37x4x30 ECT-32 Telescoping Inner Boxes 10-Pack

PN: T37430INNER

37 x 4 x 30 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$104.97 / BUNDLE
IN STOCK ECT-32 single-wall kraft inner mirror boxes engineered for safe glass and fragile item shipping. 37" x 3.75" x 30.75" dimensions with proven stacking strength. Sold in bundles of 10–pair with our OUTERMIRROR outer box for complete two-wall protection and professional handling compliance.
Boxes - Corrugated

37x3.75x30.75 ECT-32 Kraft Inner Mirror Box 10-Pack

PN: INNERMIRROR

37 x 3.75 x 30 3/4 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$75.11 / BUNDLE
IN STOCK ECT-32 kraft corrugated side loading boxes designed for high-speed fulfillment operations. Full overlap (FOL) flaps provide superior product protection while end-loading design maximizes operational efficiency. Ships flat in bundles of 20 to reduce storage footprint and freight costs.
Boxes - Corrugated

36x5x30 ECT-32 Kraft Side Loading Boxes 20-Pack

PN: 36530FOL

36 x 5 x 30 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$95.27 / BUNDLE

Product Help Request

Send the SKU, quantity, delivery ZIP, and any required specs so we can route the request.

Overview

Compare large cardboard boxes by the complete packed item, listed dimensions and purchase quantity. The selected formats below include 18-inch and 20-inch cartons with different bundle counts.

Measure the complete packed item, including the cushioning and closure your process requires. Compare that measurement with the exact product’s usable interior. The examples below distinguish explicit inside dimensions from a listed size that still needs confirmation.

Compare selected current box formats

Curated examples, not the complete assortment. Sizes are inches; counts are whole purchase units.
Exact SKU Dimensions Listed board / construction Boxes per unit Fit evidence
181818 18 × 18 × 18 ECT-32 20 Inside dimensions explicit
202020 20 × 20 × 20 ECT-32 10 Listed size; confirm usable interior
201812 20 × 18 × 12 ECT-32 10 Listed size; confirm usable interior

ECT is an edge-crush rating of the corrugated board. It does not establish a finished carton’s safe payload, drop resistance or stacking limit. Keep wall construction separate from ECT, and evaluate the complete package for the item, storage and shipping method.

Measure the finished parcel, too

Inside dimensions help check the item’s fit; outside dimensions are relevant to carrier rating. Confirm the closed parcel’s outside measurements, weight and service before comparing shipping costs. A larger carton may change dimensional pricing, but size alone does not determine the charge.

Choose double wall because the complete packaging specification calls for it, rather than using a generic 40- or 65-pound cutoff. ECT-44 is a board grade and does not by itself mean double-wall construction.

Plan whole bundles

Box purchase-unit calculator

120 boxes at 20 per unit require 6 units: 120 boxes, none extra.

Whole purchase units = round up(boxes needed ÷ boxes per unit). The count must come from the selected SKU, not the box size. Quantity planning does not confirm fit or payload.

For 120 boxes, a 20-count format requires six units. A 10-count format requires twelve. Compare the same required count, then include the surplus produced by whole-unit rounding. A lower bundle price does not necessarily mean a lower delivered price per box.

For a bulk or wholesale shipping-box order, send each SKU, required boxes or bundles, destination ZIP, required date and receiving conditions. Include residential or commercial delivery, dock or forklift access, and any liftgate or appointment requirement. Compare actual checkout shipping or a written delivered quote. No freight rate is inferred from size alone.

Questions before ordering

Can I buy by the individual box?

These examples are sold in the purchase counts shown. The product page establishes the order unit and current ordering details.

Does a stronger ECT number mean I can pack more weight?

A board rating alone cannot answer that. Confirm wall construction and the complete packaging requirements for your shipment; test the packed item where appropriate.

How should I compare two suppliers?

Match usable size, construction, grade and boxes supplied. Divide the merchandise total plus actual shipping and applicable fees by boxes supplied, using the same tax treatment for both orders.

Continue your buying plan

Buying path

Buy Large Cardboard Boxes (18"+) by the specs that change the order

Use filters, product titles, and product pages to compare size, material, pack count, case quantity, and fit before ordering.

Compare

Use filters and product titles to narrow by the specs that affect fit.

Confirm

Open the product page before ordering a case so you can check quantity, unit, and limits.

Reorder

Save the SKU or product link for repeat purchasing and support questions.

Larger orders

For pallet, recurring, or mixed-SKU orders, send your list and ZIP and get a delivered price by email.

What to check first

  • Inside dimensions
  • Board grade or strength rating
  • Box style and closure
  • Case or bundle quantity
Common wrong-order risk: Choosing the outside size instead of the inside size. Confirm product fit, void fill, and storage space before ordering.
Use the box size calculator -> Get a delivered quote for larger orders -> Compare corrugated box types -> View products below ->