Large Cardboard Boxes (18"+)

IN STOCK Heavy-duty ECT-32 single-wall corrugated cartons sized 22
Boxes - Corrugated

22x18x8 ECT-32 Kraft Corrugated Cartons - Industrial Strength, Bundle of 20

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
Boxes - Corrugated

22x18x6" ECT-32 Kraft Corrugated Boxes - Shallow Depth Shipping, Bundle of 20

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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Shipping Boxes — ECT-32 Kraft Corrugated, 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
Boxes - Corrugated

20x20x15" ECT-32 Kraft Corrugated Boxes - Bundle of 20

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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Heavy-Duty Kraft Corrugated Boxes - Bundle of 10

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
Boxes - Corrugated

20x20x12 Multi-Depth Corrugated Boxes, ECT-32 Kraft - Adjustable (Bundle of 15)

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
Boxes - Corrugated

20x20x12 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Shipping Boxes — ECT-32 Kraft Corrugated, 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
Boxes - Corrugated

20x20x8 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Kraft Corrugated Boxes ECT-32 Single Wall - Bundle of 15

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
Boxes - Corrugated

20x20x6" ECT-32 Kraft Corrugated Boxes - Shallow Depth, Bundle of 15

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
Boxes - Corrugated

20x20x4" ECT-32 Kraft Corrugated Boxes - Shallow Depth Shipping, Bundle of 10

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
Boxes - Corrugated

20x20x2 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Shipping Boxes — ECT-32 Kraft Corrugated, 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
Boxes - Corrugated

28x12x8 Shipping Boxes — ECT-32 Kraft Corrugated, 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
Boxes - Corrugated

24x16x16 ECT-48 Double Wall Kraft Shipping Boxes - Bundle of 10

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
Boxes - Corrugated

24x16x12 ECT-48 Double Wall Shipping Boxes - Heavy-Duty Kraft, Bundle of 10

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 - Heavy-Duty Shipping, 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
Boxes - Corrugated

24x16x6 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Shipping Boxes — ECT-32 Kraft Corrugated, 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
Boxes - Corrugated

20x20x20 Heavy-Duty ECT-44 Kraft Corrugated Boxes - Bundle of 10

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" Multi-Depth Corrugated Boxes ECT-32 Kraft - Bundle of 10

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 Box - Bundle of 10

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
Boxes - Corrugated

20x20x16 ECT-48 Double Wall Corrugated Boxes - Bundle of 10

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
Boxes - Corrugated

20x20x12 ECT-48 Double Wall Hand Hole Box - Bundle of 10

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
Boxes - Corrugated

20x20x12 ECT-48 Double Wall Kraft Shipping Boxes - Bundle of 10

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 - Heavy-Duty Shipping, Bundle of 10

PN: HD202010DW

20 x 20 x 10 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$72.82 / BUNDLE
IN STOCK 10x10x30
Boxes - Corrugated

10x10x30 Shipping Boxes - ECT-32 Kraft Corrugated, 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
Boxes - Corrugated

24x16x24 Shipping Boxes — ECT-32 Kraft Corrugated, 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
Boxes - Corrugated

22x18x16 ECT-48 Double Wall Kraft Boxes - Heavy Duty Shipping, Bundle of 10

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 - Heavy-Duty Shipping, Bundle of 10

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 Boxes - Bundle of 10

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
Boxes - Corrugated

20x20x20 ECT-32 White Corrugated Boxes - Premium Cube Pack of 10

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
Boxes - Corrugated

20x18x22 Shipping Boxes — ECT-32 Kraft Corrugated, 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
Boxes - Corrugated

16x16x24" ECT-32 Kraft Corrugated Boxes - Industrial Strength, 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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Boxes with Hand Holes - Bundle of 10

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
Boxes - Corrugated

20x20x20" ECT-71 Double Wall Boxes - 140# Capacity, Bundle of 10

PN: HD202020HDDW

20 x 20 x 20 in ECT-71 Double Wall Corrugated 10 PER BUNDLE
$218.32 / BUNDLE
IN STOCK Adjust from 4
Boxes - Corrugated

37x4x30" ECT-32 Telescoping Inner Boxes - Adjustable Tall Item Packaging, Bundle of 10

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
Boxes - Corrugated

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

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 - Full Overlap Flaps, Bundle of 20

PN: 36530FOL

36 x 5 x 30 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$95.27 / BUNDLE
IN STOCK End-load your products with confidence using these 36x5x24 corrugated side loading boxes. Engineered with ECT-32 kraft material and full overlap flaps for maximum protection during storage and transit. Ships flat to maximize warehouse efficiency–20 boxes per bundle.
Boxes - Corrugated

36x5x24 ECT-32 Kraft Side Loading Boxes - Full Overlap, Bundle of 20

PN: 36524FOL

36 x 5 x 24 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$98.07 / BUNDLE
IN STOCK Standard-duty corrugated shipping boxes sized 27
Boxes - Corrugated

27x14x9" ECT-32 Kraft Corrugated Boxes - Bundle of 20

PN: 27149

27 x 14 x 9 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$54.79 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 26x15x5
Boxes - Corrugated

26x15x5 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 26155

26 x 15 x 5 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$50.76 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 25
Boxes - Corrugated

25x16x16 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 251616

25 x 16 x 16 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$37.15 / BUNDLE

Product Help Request

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

Overview

Large cardboard boxes — 18" and up on the longest side, through 24x24x24 cubes and long side-loading cartons past 36". Bundle quantities with per-box pricing shown, shipped from 5 US regional warehouses.

How to choose: at these sizes the box wall does real structural work — anything dense belongs in double wall / ECT-44+, and anything palletized should be checked against pallet footprint before ordering. Dimensional weight dominates parcel pricing here, so oversizing costs twice: material and freight. Bulk-scale loads? Consider gaylord boxes instead. Full reference at the size chart.

Frequently asked questions

When should I use double wall for a large box?
Once contents pass roughly 40–65 lb or the box will be stacked on a pallet, step up from ECT-32 to double wall (ECT-44/48). Large single-wall boxes bulge and crush under loads a smaller box of the same grade handles fine.

Do large boxes cost more to ship?
Usually, and mostly through dimensional weight rather than actual weight. Carriers price the space a large box occupies; the tightest size that safely fits your load is the cheapest one to ship.

Updated August 1, 2026. Sizes refresh automatically as catalog stock changes.

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 needs, send support the details before placing a large order.

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 -> Contact support for larger orders -> Compare corrugated box types -> View products below ->