Large Cardboard Boxes (18"+)

IN STOCK Consolidate multiple shipments with these 36x22x22 double wall corrugated boxes engineered for heavy loads. ECT-51 kraft construction delivers superior stacking strength and compression resistance for bulky, irregularly shaped items. Sold as a bundle of 5 cartons.
Boxes - Corrugated

36x22x22 Double Wall ECT-51 Corrugated Boxes - Heavy-Duty Shipping, Bundle of 5

PN: AF362222

36 x 22 x 22 in ECT-51 Double Wall Corrugated 5 PER BUNDLE
$70.66 / BUNDLE
IN STOCK Industrial-grade ECT-44 single wall corrugated side loading boxes sized 18
Boxes - Corrugated

18x6x45 ECT-44 Kraft Side Loading Boxes - Bundle of 5

PN: HD18645FOL

18 x 6 x 45 in ECT-44 Single Wall Corrugated 5 PER BUNDLE
$61.34 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 9x9x48
Boxes - Corrugated

9x9x48 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 9948

9 x 9 x 48 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$104.50 / BUNDLE
IN STOCK Maximize your warehouse efficiency with this 58x41x45
Boxes - Corrugated

58x41x45" ECT-51 Double Wall Corrugated Box - Heavy-Duty Shipping Carton

PN: AF584145

58 x 41 x 45 in ECT-51 Double Wall Corrugated 1 PER BUNDLE
$122.76 / BUNDLE
IN STOCK ECT-32 kraft corrugated long boxes designed for efficient packing of elongated items like wine bottles, umbrellas, and carpet rolls. The 48
Boxes - Corrugated

48x10x10 ECT-32 Kraft Corrugated Boxes - Easy-Pack Long Format, 20-Bundle

PN: 481010

48 x 10 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$104.61 / BUNDLE
IN STOCK 40x18x8
Boxes - Corrugated

40x18x8" ECT-32 Kraft Corrugated Boxes - Bundle of 10

PN: 40188

40 x 18 x 8 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$45.84 / BUNDLE
IN STOCK Adjustable two-piece telescoping inner boxes designed for tall and irregularly shaped items. 18
Boxes - Corrugated

18x18x40" Telescoping Inner Box ECT-32 Kraft - Adjustable Height, Bundle of 10

PN: T181840INNER

18 x 18 x 40 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$139.94 / BUNDLE
IN STOCK 10x10x48 ECT-32 Kraft Telescoping Inner Box - Adjustable Tall Carton, 20-Pack
Boxes - Corrugated

10x10x48 ECT-32 Kraft Telescoping Inner Box - Adjustable Tall Carton, 20-Pack

PN: T101048INNER

10 x 10 x 48 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$83.85 / BUNDLE
IN STOCK Industrial-grade 30x30x25 corrugated shipping boxes with ECT-32 single-wall kraft construction deliver reliable stacking strength for high-volume fulfillment operations. Each bundle includes 5 boxes–optimize your freight efficiency and reduce per-unit packaging costs. Fully recyclable kraft material meets sustainability standards.
Boxes - Corrugated

30x30x25 Shipping Boxes — ECT-32 Kraft Corrugated, 5-Pack

PN: 303025

30 x 30 x 25 in ECT-32 Single Wall Corrugated 5 PER BUNDLE
$47.55 / BUNDLE
IN STOCK 10x10x48 ECT-32 Kraft Corrugated Boxes - Bundle of 20
Boxes - Corrugated

10x10x48 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 101048

10 x 10 x 48 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$74.49 / BUNDLE
IN STOCK Heavy-duty 8x8x50 corrugated boxes built from ECT-32 kraft material for shipping tall, fragile items like trophies, shelving units, and fishing rods. End-loading design enables fast, secure sealing. Sold as a bundle of 20 boxes–ships flat to maximize freight efficiency and storage space.
Boxes - Corrugated

8x8x50 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 8850

8 x 8 x 50 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$130.23 / BUNDLE
IN STOCK Heavy-duty 36x5x48 side loading boxes with ECT-44 single wall corrugated construction deliver reliable stacking performance and freight efficiency. Kraft material ships and stores flat, reducing warehouse footprint by up to 70%. Bundle of 5 boxes–the industry standard for fulfillment operations managing high-volume SKUs.
Boxes - Corrugated

36x5x48 ECT-44 Kraft Side Loading Boxes - Bundle of 5

PN: 36548FOL

36 x 5 x 48 in ECT-44 Single Wall Corrugated 5 PER BUNDLE
$73.40 / BUNDLE
IN STOCK Heavy-duty 22x22x36 corrugated boxes built with ECT-32 single wall kraft material for superior stacking strength and freight efficiency. End-loading design enables fast packing and sealing of tall items including shelving, trophies, and fishing rods. Sold flat in convenient bundles of 10 to maximize warehouse storage.
Boxes - Corrugated

22x22x36 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 222236

22 x 22 x 36 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$74.27 / BUNDLE
IN STOCK Adjustable two-piece telescoping outer boxes built for tall and irregularly shaped shipments. 18.5×18.5×40
Boxes - Corrugated

18.5x18.5x40" Telescoping Outer Boxes ECT-32 Kraft - 10 Pack

PN: T181840OUTER

18 1/2 x 18 1/2 x 40 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$145.01 / BUNDLE
IN STOCK 10.5x10.5x48
Boxes - Corrugated

10.5x10.5x48" Telescoping Outer Box ECT-32 Kraft - 20-Pack Bundle

PN: T101048OUTER

10 1/2 x 10 1/2 x 48 in ECT-32 Corrugated 20 PER BUNDLE
$111.20 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping cartons designed for reliable performance in high-volume fulfillment operations. These 36x24x18 boxes deliver proven stacking strength and freight efficiency, sold in bundles of 10 for bulk cost savings. Ideal for warehouse managers seeking dependable, recyclable corrugated packaging solutions.
Boxes - Corrugated

36x24x18 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 362418

36 x 24 x 18 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$104.48 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 30
Boxes - Corrugated

30x30x12 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 303012

30 x 30 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$89.58 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 48x12x12
Boxes - Corrugated

48x12x12 Shipping Boxes - ECT-32 Kraft Corrugated, 10-Pack

PN: 481212

48 x 12 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$43.59 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 48x12x6 corrugated boxes. ECT-32 kraft construction delivers reliable stacking strength and crush resistance. Sold in bundles of 20 and shipped flat to maximize freight efficiency and storage space.
Boxes - Corrugated

48x12x6 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 48126

48 x 12 x 6 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$111.00 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 40x20x20
Boxes - Corrugated

40x20x20 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 402020

40 x 20 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$121.05 / BUNDLE
IN STOCK Heavy-duty 36x24x24 corrugated shipping boxes built from ECT-32 kraft material for reliable protection and optimal stacking performance. Each bundle includes 5 boxes, reducing per-unit costs for warehouse managers and fulfillment operations. Recyclable construction supports sustainable logistics without sacrificing strength.
Boxes - Corrugated

36x24x24 Shipping Boxes — ECT-32 Kraft Corrugated, 5-Pack

PN: 362424

36 x 24 x 24 in ECT-32 Single Wall Corrugated 5 PER BUNDLE
$41.46 / BUNDLE
IN STOCK ECT-32 single wall corrugated boxes in 36x24x12
Boxes - Corrugated

36x24x12 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 362412

36 x 24 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$62.45 / BUNDLE
IN STOCK Heavy-duty 36x24x10 corrugated boxes with ECT-32 kraft construction deliver proven stacking performance and freight efficiency for demanding warehouse environments. Perfect for mid-size product shipments, these single-wall cartons maximize cube utilization while maintaining structural integrity. Sold as a bundle of 10–reduce cost per unit while ensuring consistent packaging across your fulfillment operation.
Boxes - Corrugated

36x24x10 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 362410

36 x 24 x 10 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$98.19 / BUNDLE
IN STOCK Heavy-duty ECT-48 kraft double wall cartons engineered for maximum protection and stacking performance. 30
Boxes - Corrugated

30x30x12 ECT-48 Double Wall Kraft Boxes - Heavy-Duty Shipping, Bundle of 5

PN: HD303012DW

30 x 30 x 12 in ECT-48 Double Wall Corrugated 5 PER BUNDLE
$78.74 / BUNDLE
IN STOCK Heavy-duty 30x30x10 corrugated boxes built from ECT-32 kraft material deliver consistent stacking performance for high-volume fulfillment operations. Each 15-pack bundle maximizes freight efficiency while reducing per-unit costs. Ideal for warehouses and 3PLs shipping mid-size products with confidence.
Boxes - Corrugated

30x30x10 Shipping Boxes — ECT-32 Kraft Corrugated, 15-Pack

PN: 303010

30 x 30 x 10 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$112.42 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 30
Boxes - Corrugated

30x30x8 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 30308

30 x 30 x 8 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$66.90 / BUNDLE
IN STOCK These 30x30x6 corrugated cartons feature ECT-32 kraft construction and ship flat to maximize warehouse storage efficiency. Ideal for apparel, books, picture frames, and artwork requiring shallow-depth packaging. Bundle of 15 flat boxes reduces per-unit cost and freight overhead.
Boxes - Corrugated

30x30x6 Shipping Boxes — ECT-32 Kraft Corrugated, 15-Pack

PN: 30306

30 x 30 x 6 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$113.30 / BUNDLE
IN STOCK Adjustable two-piece telescoping inner cartons sized 20x20x40 inches–perfect for tall, oversized, and irregularly shaped shipments. Manufactured from durable ECT-32 kraft corrugated with full overlap bottom reinforcement for maximum stacking strength. Sold as bundle of 10; pair with T202040OUTER to complete your shipping set.
Boxes - Corrugated

20x20x40 Telescoping Inner Kraft Boxes, ECT-32, Bundle of 10

PN: T202040INNER

20 x 20 x 40 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$94.04 / BUNDLE
IN STOCK Adjustable two-piece telescoping inner boxes sized 12x12x48
Boxes - Corrugated

12x12x48 ECT-32 Kraft Telescoping Inner Boxes - Adjustable Design, Bundle of 15

PN: T121248INNER

12 x 12 x 48 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$105.73 / BUNDLE
IN STOCK Heavy-duty ECT-48 kraft double wall boxes deliver superior protection and stacking performance for demanding warehouse operations. These 40x20x20 corrugated cartons combine maximum crush resistance with efficient flat-ship storage. Bundle of 5 units reduces your per-box cost and freight overhead.
Boxes - Corrugated

40x20x20 ECT-48 Double Wall Corrugated Boxes - Heavy-Duty Shipping, Bundle of 5

PN: HD402020DW

40 x 20 x 20 in ECT-48 Double Wall Corrugated 5 PER BUNDLE
$83.72 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 36
Boxes - Corrugated

36x24x20 Shipping Boxes — ECT-32 Kraft Corrugated, 5-Pack

PN: 362420

36 x 24 x 20 in ECT-32 Single Wall Corrugated 5 PER BUNDLE
$38.36 / BUNDLE
IN STOCK ECT-48 double wall corrugated boxes built for high-performance industrial shipping. 36
Boxes - Corrugated

36x24x12 ECT-48 Double Wall Boxes - Heavy-Duty Kraft Cartons, Bundle of 5

PN: HD362412DW

36 x 24 x 12 in ECT-48 Double Wall Corrugated 5 PER BUNDLE
$57.98 / BUNDLE
IN STOCK ECT-48 heavy-duty double wall corrugated boxes built for demanding warehouse and fulfillment operations. These 36x24x8 kraft cartons deliver maximum stacking performance and freight efficiency while shipping flat to minimize storage overhead. Bundle of 10 units.
Boxes - Corrugated

36x24x8 ECT-48 Double Wall Kraft Boxes - Heavy Duty Shipping Cartons, Bundle of 10

PN: HD36248DW

36 x 24 x 8 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$153.19 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping cartons sized 36
Boxes - Corrugated

36x24x8 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 36248

36 x 24 x 8 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$81.50 / BUNDLE
IN STOCK Ship smarter with 36x24x6 ECT-32 kraft corrugated boxes–engineered for shallow products like apparel, books, artwork, and frames. Ships flat to maximize your warehouse storage and reduce freight costs. Bundle of 10 boxes.
Boxes - Corrugated

36x24x6 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 36246

36 x 24 x 6 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$55.14 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 36x24x4
Boxes - Corrugated

36x24x4 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 36244

36 x 24 x 4 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$54.87 / BUNDLE
IN STOCK ECT-48 heavy-duty double wall corrugated boxes designed for demanding warehouse and fulfillment operations. 30
Boxes - Corrugated

30x30x16 ECT-48 Double Wall Corrugated Boxes - Heavy-Duty Shipping, Bundle of 5

PN: HD303016DW

30 x 30 x 16 in ECT-48 Double Wall Corrugated 5 PER BUNDLE
$83.58 / BUNDLE
IN STOCK Heavy-duty 30
Boxes - Corrugated

30x30x16 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 303016

30 x 30 x 16 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$79.28 / BUNDLE
IN STOCK Professional-grade 24 x 24 x 36
Boxes - Corrugated

24x24x36 Shipping Boxes — ECT-32 Kraft Corrugated, 5-Pack

PN: 242436

24 x 24 x 36 in ECT-32 Single Wall Corrugated 5 PER BUNDLE
$47.80 / BUNDLE
IN STOCK Ship and store efficiently with these 14x4x52 side loading corrugated boxes featuring ECT-32 single-wall construction. Full overlap (FOL) design ships flat to maximize warehouse space. Bundle of 15 boxes reduces per-unit cost and streamlines your fulfillment operation.
Boxes - Corrugated

14x4x52 ECT-32 Side Loading Boxes - Full Overlap FOL, Bundle of 15

PN: 14452FOL

14 x 4 x 52 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$106.86 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 12
Boxes - Corrugated

12x12x48 Shipping Boxes — ECT-32 Kraft Corrugated, 15-Pack

PN: 121248

12 x 12 x 48 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$89.30 / BUNDLE
IN STOCK ECT-32 rated 8x4x52
Boxes - Corrugated

8x4x52" ECT-32 Side Loading Box - Full Overlap FOL Kraft, 15-Pack

PN: 8452FOL

8 x 4 x 52 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$66.07 / BUNDLE
IN STOCK Industrial-grade 36x24x18 double wall corrugated cartons rated ECT-48 kraft for maximum protection and stacking performance. Built for high-volume shipping, these heavy-duty boxes arrive flat in bundles of 5, reducing your storage footprint and freight costs. Trust tested construction that keeps shipments secure every time.
Boxes - Corrugated

36x24x18 ECT-48 Double Wall Corrugated Boxes - Heavy Duty Shipping, 5-Bundle

PN: HD362418DW

36 x 24 x 18 in ECT-48 Double Wall Corrugated 5 PER BUNDLE
$102.63 / BUNDLE
IN STOCK Adjustable two-piece telescoping outer boxes sized 20.5
Boxes - Corrugated

20.5x20.5x40" Telescoping Outer Kraft Boxes ECT-32 - Adjustable Tall Cartons, Bundle of 10

PN: T202040OUTER

20 1/2 x 20 1/2 x 40 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$105.43 / BUNDLE
IN STOCK Ship tall items with confidence using these 20×20×40
Boxes - Corrugated

20x20x40 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 202040

20 x 20 x 40 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$97.48 / BUNDLE
IN STOCK Ship tall and irregularly shaped items with confidence using these ECT-32 kraft telescoping boxes. The adjustable two-piece design eliminates wasted space while the full overlap bottom delivers superior stacking strength. Bundle of 15 outers–pair with T121248INNER cartons for complete protection.
Boxes - Corrugated

12.5x12.5x48" Telescoping Kraft Corrugated Boxes ECT-32 - Bundle of 15

PN: T121248OUTER

12 1/2 x 12 1/2 x 48 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$110.74 / BUNDLE
IN STOCK Premium ECT-48 double wall corrugated shipping cartons built for high-performance logistics. 12x12x48
Boxes - Corrugated

12x12x48 ECT-48 Double Wall Kraft Boxes - Heavy Duty Shipping Cartons, Bundle of 10

PN: HD121248DW

12 x 12 x 48 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$111.79 / BUNDLE
IN STOCK ECT-44 single-wall kraft corrugated boxes engineered for side loading operations and maximum freight efficiency. 54x8x28
Boxes - Corrugated

54x8x28 ECT-44 Kraft Side Loading Boxes - Bundle of 5

PN: HD54828FOL

54 x 8 x 28 in ECT-44 Single Wall Corrugated 5 PER BUNDLE
$124.40 / 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 ->