Large Cardboard Boxes (18"+)

IN STOCK ECT-32 single wall kraft corrugated boxes in 30
Boxes - Corrugated

30x20x6 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 30206

30 x 20 x 6 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$53.21 / BUNDLE
IN STOCK Standard-strength ECT-32 kraft corrugated shipping boxes in 25x25x20
Boxes - Corrugated

25x25x20 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 252520

25 x 25 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$65.28 / BUNDLE
IN STOCK Heavy-duty 25x25x12 corrugated shipping boxes with ECT-32 kraft construction deliver trusted strength for mid-size industrial shipments. This 15-box bundle maximizes your freight efficiency while maintaining superior stacking performance. Fully recyclable and built to protect your products in transit.
Boxes - Corrugated

25x25x12 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 252512

25 x 25 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$104.19 / BUNDLE
IN STOCK Industrial-grade 24x24x24 triple wall corrugated boxes engineered for heavy loads and long-distance shipments. ECT-90 kraft construction delivers over ½
Boxes - Corrugated

24x24x24 ECT-90 Triple Wall Corrugated Boxes 5-Pack

PN: HD242424TW

24 x 24 x 24 in ECT-90 Triple Wall Corrugated 5 PER BUNDLE
$159.86 / BUNDLE
IN STOCK ECT-44 single wall kraft corrugated boxes sized 44
Boxes - Corrugated

44x6x35 ECT-44 Kraft Side Loading Boxes 10-Pack

PN: HD44635FOL

44 x 6 x 35 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$147.75 / BUNDLE
IN STOCK Ship long, narrow items efficiently with 36x14x14 ECT-32 kraft corrugated boxes featuring extended side openings for rapid packing. Bundle of 15 units arrives flat, maximizing freight savings and warehouse space. Ideal for wine bottles, umbrellas, carpet rolls, and similar elongated products.
Boxes - Corrugated

36x14x14 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 361414

36 x 14 x 14 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$88.09 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 30
Boxes - Corrugated

30x20x20 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 302020

30 x 20 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$56.52 / BUNDLE
IN STOCK Proven ECT-32 single-wall corrugated construction delivers reliable stacking strength and burst resistance for high-volume fulfillment operations. This 30x20x18 kraft box bundle of 15 ships flat to maximize warehouse storage and minimize freight spend. The industry-standard choice for warehouse managers prioritizing durability and efficiency.
Boxes - Corrugated

30x20x18 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 302018

30 x 20 x 18 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$125.10 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes sized 30×20×12
Boxes - Corrugated

30x20x12 ECT-32 Kraft Corrugated Boxes Durable Shipping 15-Pack

PN: 302012

30 x 20 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$70.67 / BUNDLE
IN STOCK ECT-32 single wall corrugated cartons sized 30
Boxes - Corrugated

30x20x8 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 30208

30 x 20 x 8 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$84.61 / BUNDLE
IN STOCK Ship round and odd-shaped products with confidence using our 25x25x25
Boxes - Corrugated

25x25x25 ECT-32 Kraft Corrugated Cube Shipping Boxes 10-Pack

PN: 252525

25 x 25 x 25 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$77.31 / BUNDLE
IN STOCK Ship tall items efficiently with these 14x14x36 corrugated boxes made from ECT-32 kraft material. End-loading design speeds packing and sealing. Sold as a bundle of 15 boxes, flat-shipped to maximize freight efficiency and reduce your per-unit packaging cost.
Boxes - Corrugated

14x14x36 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 141436

14 x 14 x 36 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$62.10 / BUNDLE
IN STOCK ECT-32 single wall corrugated side loading boxes designed for vertical packing efficiency and maximum stackability. 14
Boxes - Corrugated

14x4x42 ECT-32 Full Overlap FOL Side Loading Boxes 15-Pack

PN: 14442FOL

14 x 4 x 42 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$90.08 / BUNDLE
IN STOCK 10x10x40 ECT-32 Kraft Corrugated Boxes - Tall Shipping, Bundle of 25
Boxes - Corrugated

10x10x40 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 101040

10 x 10 x 40 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$72.64 / BUNDLE
IN STOCK Ship tall items with confidence using our 8x8x42 corrugated boxes in ECT-32 kraft single-wall construction. End-loading design speeds packing and sealing. Sold as bundle of 20–ideal for warehouses and fulfillment centers shipping trophies, shelving, rods, and poles.
Boxes - Corrugated

8x8x42 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 8842

8 x 8 x 42 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$81.50 / BUNDLE
IN STOCK Space-efficient 4x4x46 tall corrugated boxes made from ECT-32 kraft single wall material. End-load design enables fast, efficient packing and sealing operations. Ships flat in bundles of 25–perfect for warehouses requiring vertical storage solutions without the weight penalty of mailing tubes.
Boxes - Corrugated

4x4x46 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4446

4 x 4 x 46 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$81.21 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 20x20x30
Boxes - Corrugated

20x20x30 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 202030

20 x 20 x 30 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$58.19 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes built for demanding warehouse and fulfillment operations. 25x25x25 cube dimensions maximize pallet density and reduce freight costs. Ships flat to save 80% storage space–order in bundles of 5.
Boxes - Corrugated

25x25x25 ECT-48 Kraft Heavy Duty Cube Double Wall Corrugated Shipping Box 5-Pack

PN: HD252525DW

25 x 25 x 25 in ECT-48 Double Wall Corrugated 5 PER BUNDLE
$92.76 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 24x24x26
Boxes - Corrugated

24x24x26 ECT-32 Kraft Corrugated Boxes 10-Pack

PN: 242426

24 x 24 x 26 in ECT-32 Corrugated 10 PER BUNDLE
$102.78 / BUNDLE
IN STOCK Ship tall items efficiently with these 15x15x36 corrugated boxes made from sturdy ECT-32 kraft material. End-loading design allows fast insertion and sealing. Bundle of 15 boxes ships flat to maximize freight efficiency and reduce storage footprint.
Boxes - Corrugated

15x15x36 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 151536

15 x 15 x 36 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$87.39 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes in 26x26x20
Boxes - Corrugated

26x26x20 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 262620

26 x 26 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$73.66 / BUNDLE
IN STOCK Industrial-grade 26x26x14 corrugated boxes rated ECT-32 for reliable stacking and freight performance. This 10-pack bundle of kraft shipping cartons ships and stores flat, maximizing your warehouse space while reducing handling costs. Built tough for repeated use in fulfillment operations.
Boxes - Corrugated

26x26x14 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 262614

26 x 26 x 14 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$92.29 / BUNDLE
IN STOCK Ship long, narrow items with confidence using these 48x4x4 ECT-32 kraft corrugated boxes. Wide openings along the 48
Boxes - Corrugated

48x4x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4844

48 x 4 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$78.13 / BUNDLE
IN STOCK Ship long, narrow items efficiently with 40x12x12 ECT-32 kraft corrugated boxes featuring wide long-side openings for fast packing. Each bundle includes 15 boxes–ideal for wine bottles, umbrellas, carpet rolls, and specialty items. Reduce wasted space and cut per-unit shipping costs.
Boxes - Corrugated

40x12x12 ECT-32 Kraft Long Corrugated Shipping Boxes 15-Pack

PN: 401212

40 x 12 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$58.16 / BUNDLE
IN STOCK Professional-grade 36x16x16 corrugated shipping boxes featuring ECT-48 double wall kraft construction for maximum stacking strength and load protection. Ideal for heavy items, mid-size freight, and high-volume warehouses. Ships flat in bundles of 10 to minimize storage footprint and reduce inbound freight costs.
Boxes - Corrugated

36x16x16 ECT-48 Kraft Double Wall Corrugated Boxes 10-Pack

PN: HD361616DW

36 x 16 x 16 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$131.27 / BUNDLE
IN STOCK Heavy-duty 36x16x16 corrugated shipping boxes rated ECT-32 for reliable stacking and protection of medium-weight industrial shipments. Sold in convenient bundles of 15 kraft cartons, these brown corrugated boxes maximize freight efficiency and reduce per-unit packaging costs. Made from recyclable kraft material–built for warehouse and fulfillment operations.
Boxes - Corrugated

36x16x16 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 361616

36 x 16 x 16 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$74.02 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes sized 36x16x5
Boxes - Corrugated

36x16x5 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 36165

36 x 16 x 5 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$80.62 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 28x24x6
Boxes - Corrugated

28x24x6 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 28246

28 x 24 x 6 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$45.25 / BUNDLE
IN STOCK Heavy-duty 26x26x12 corrugated boxes built from ECT-32 kraft material deliver reliable protection and maximum stacking strength for high-volume shipping operations. Sold in bundles of 10, these kraft cartons are fully recyclable and engineered for freight efficiency. Perfect for warehouse managers seeking cost-effective, dependable cardboard shipping containers.
Boxes - Corrugated

26x26x12 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 262612

26 x 26 x 12 in ECT-32 Corrugated 10 PER BUNDLE
$52.48 / BUNDLE
IN STOCK Industrial-grade 26x26x10 corrugated shipping boxes built from ECT-32 kraft material for maximum stacking performance and freight reliability. These heavy-duty cardboard boxes deliver superior crush resistance and are sold as a convenient bundle of 10. Perfect for warehouse managers and fulfillment directors demanding consistent quality at scale.
Boxes - Corrugated

26x26x10 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 262610

26 x 26 x 10 in ECT-32 Corrugated 10 PER BUNDLE
$49.76 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 26x26x8
Boxes - Corrugated

26x26x8 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 26268

26 x 26 x 8 in ECT-32 Corrugated 10 PER BUNDLE
$75.23 / BUNDLE
IN STOCK Ship shallow products efficiently with these 26x26x6 ECT-32 kraft corrugated boxes. Engineered for apparel, books, frames, and artwork with optimal stacking strength. Sold flat in bundles of 10 to maximize warehouse space and reduce freight volume.
Boxes - Corrugated

26x26x6 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 26266

26 x 26 x 6 in ECT-32 Corrugated 10 PER BUNDLE
$48.99 / BUNDLE
IN STOCK Adjustable two-piece telescoping inner carton designed for tall and irregularly shaped items up to 48 inches. Built from ECT-32 kraft corrugated with reinforced FOL bottom for maximum stacking strength. Pair with T4448OUTER to complete your shipping solution–25 inner boxes per bundle.
Boxes - Corrugated

4x4x48 ECT-32 Kraft Telescoping Inner Box 25-Pack

PN: T4448INNER

4 x 4 x 48 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$61.14 / BUNDLE
IN STOCK Industrial-grade 40x12x12 double wall corrugated boxes with ECT-48 rating deliver superior stacking strength and freight efficiency for high-volume fulfillment operations. Kraft construction ships flat to maximize warehouse storage and reduce logistics costs. Bundle of 10 ready to deploy.
Boxes - Corrugated

40x12x12 ECT-48 Double Wall Corrugated Boxes 10-Pack

PN: HD401212DW

40 x 12 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$110.47 / BUNDLE
IN STOCK Professional-grade 28x24x20
Boxes - Corrugated

28x24x20 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 282420

28 x 24 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$115.53 / BUNDLE
IN STOCK Industrial-grade 26x26x20 double wall corrugated boxes deliver ECT-48 rated strength for demanding warehouses and fulfillment centers. Ships and stores flat to maximize warehouse efficiency–bundle of 10 boxes ready to deploy. Built for high-volume shippers who need reliable stacking performance and freight cost savings.
Boxes - Corrugated

26x26x20 ECT-48 Double Wall Corrugated Boxes 10-Pack

PN: HD262620DW

26 x 26 x 20 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$229.42 / BUNDLE
IN STOCK Heavy-duty 26x26x16 corrugated shipping cartons built with ECT-32 kraft material for reliable stacking and freight efficiency. Each bundle includes 10 boxes–perfect for mid-size shipments in warehouse, fulfillment, and distribution operations. Recyclable kraft construction reduces environmental impact while maintaining maximum load capacity.
Boxes - Corrugated

26x26x16 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 262616

26 x 26 x 16 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$80.69 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 26
Boxes - Corrugated

26x26x4 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 26264

26 x 26 x 4 in ECT-32 Corrugated 15 PER BUNDLE
$76.36 / BUNDLE
IN STOCK Industrial-grade 24x24x28 corrugated shipping boxes built from ECT-32 kraft material for reliable stacking and freight protection. Each bundle contains 10 boxes, optimizing your warehouse inventory and reducing per-unit costs. Fully recyclable kraft construction meets modern sustainability standards while delivering the strength your operation demands.
Boxes - Corrugated

24x24x28 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 242428

24 x 24 x 28 in ECT-32 Corrugated 10 PER BUNDLE
$105.83 / BUNDLE
IN STOCK ECT-32 single wall corrugated boxes in 22x22x30 dimensions deliver reliable strength for warehouse, fulfillment, and shipping operations. Kraft construction stacks efficiently and maximizes pallet density. Sold as bundles of 10 for volume savings and freight efficiency.
Boxes - Corrugated

22x22x30 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 222230

22 x 22 x 30 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$90.48 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes designed for shipping tall items like trophies, shelving, and fishing rods. 16x16x36
Boxes - Corrugated

16x16x36 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 161636

16 x 16 x 36 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$50.67 / BUNDLE
IN STOCK ECT-32 single-wall corrugated lamp boxes sized 12
Boxes - Corrugated

12x12x46 ECT-32 Kraft Lamp Boxes 15-Pack

PN: INNERLAMP

12 x 12 x 46 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$64.94 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 12
Boxes - Corrugated

12x12x40 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 121240

12 x 12 x 40 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$55.61 / BUNDLE
IN STOCK Adjustable two-piece telescoping inner boxes designed for tall and irregularly shaped items. Made from ECT-32 kraft corrugated with full overlap bottoms for maximum stacking strength. Sold as bundle of 15–pair with T12448OUTER to complete your shipping solution.
Boxes - Corrugated

12x4x48 ECT-32 Kraft Telescoping Inner Boxes 15-Pack

PN: T12448INNER

12 x 4 x 48 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$94.56 / BUNDLE
IN STOCK Heavy-duty 4x4x48 corrugated boxes manufactured from ECT-32 kraft material deliver reliable protection for tall, narrow items. End-load design enables fast insertion and sealing, reducing packing labor. Sold in convenient 25-box bundles to maximize volume savings for warehouse managers and fulfillment operations.
Boxes - Corrugated

4x4x48 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4448

4 x 4 x 48 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$55.41 / BUNDLE
IN STOCK ECT-44 single-wall kraft corrugated boxes in 36x5x42 dimensions–the industry standard for high-volume fulfillment operations. Ships and stores flat to maximize warehouse efficiency. Bundle of 5 reduces per-unit costs and freight overhead.
Boxes - Corrugated

36x5x42 ECT-44 Kraft Side Loading Boxes 5-Pack

PN: 36542FOL

36 x 5 x 42 in ECT-44 Single Wall Corrugated 5 PER BUNDLE
$44.39 / BUNDLE
IN STOCK Heavy-duty 30x6x40 side loading boxes manufactured from ECT-44 kraft corrugated with full overlap flaps for maximum edge protection. End-opening design streamlines product insertion and reduces labor time. Ships flat in bundles of 10 to minimize storage footprint and freight costs.
Boxes - Corrugated

30x6x40 ECT-44 Kraft Side Loading Boxes 10-Pack

PN: HD30640FOL

30 x 6 x 40 in ECT-44 Corrugated 10 PER BUNDLE
$129.01 / BUNDLE
IN STOCK Industrial-grade 26 x 26 x 12
Boxes - Corrugated

26x26x12 ECT-48 Kraft Double Wall Corrugated Boxes 10-Pack

PN: HD262612DW

26 x 26 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$147.18 / 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 ->