Large Cardboard Boxes (18"+)

IN STOCK ECT-32 kraft corrugated shipping boxes sized 28x28x6 inches–engineered for shallow products that don't need deep cartons. Ships flat in bundles of 10 to maximize your warehouse efficiency and reduce freight costs on storage and transport.
Boxes - Corrugated

28x28x6 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 28286

28 x 28 x 6 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$58.99 / BUNDLE
IN STOCK Adjustable telescoping inner boxes designed for tall and irregularly shaped items. Manufactured from ECT-32 single-wall kraft corrugated with full overlap bottom reinforcement. Sold as bundle of 10–pair with T161640OUTER cartons to complete your two-piece shipping solution.
Boxes - Corrugated

16x16x40 ECT-32 Kraft Telescoping Inner Boxes 10-Pack

PN: T161640INNER

16 x 16 x 40 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$70.19 / BUNDLE
IN STOCK These 44
Boxes - Corrugated

44x12x12 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 441212

44 x 12 x 12 in ECT-32 Corrugated 15 PER BUNDLE
$96.49 / BUNDLE
IN STOCK ECT-32 single-wall corrugated boxes sized 36
Boxes - Corrugated

36x20x15 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 362015

36 x 20 x 15 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$111.37 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 36
Boxes - Corrugated

36x20x12 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 362012

36 x 20 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$131.56 / BUNDLE
IN STOCK Professional-grade 32x24x24 double wall corrugated boxes built with ECT-48 kraft material for maximum protection and stacking performance. Each bundle of 5 ships flat to maximize warehouse efficiency and reduce freight costs. Ideal for fulfillment centers handling high-volume, high-value shipments.
Boxes - Corrugated

32x24x24 ECT-48 Double Wall Corrugated Boxes 5-Pack

PN: HD322424DW

32 x 24 x 24 in ECT-48 Double Wall Corrugated 5 PER BUNDLE
$64.26 / BUNDLE
IN STOCK Industrial-grade 28x28x20 corrugated boxes built from ECT-32 kraft material deliver proven stacking strength and shipping protection. Each bundle includes 10 boxes, optimizing freight density and reducing per-unit costs for high-volume operations. Recyclable kraft construction meets sustainability requirements while maintaining structural integrity.
Boxes - Corrugated

28x28x20 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 282820

28 x 28 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$82.71 / BUNDLE
IN STOCK Heavy-duty 28x28x12 double wall corrugated boxes with ECT-48 kraft construction deliver superior stacking strength and impact resistance for demanding warehouse environments. These shipping cartons ship and store completely flat, maximizing your freight efficiency and storage capacity. Bundle of 10 boxes–the industrial standard for safe, cost-effective shipping.
Boxes - Corrugated

28x28x12 ECT-48 Kraft Heavy Duty Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD282812DW

28 x 28 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$209.10 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 28
Boxes - Corrugated

28x28x10 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 282810

28 x 28 x 10 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$110.07 / BUNDLE
IN STOCK Adjustable 8x8x48
Boxes - Corrugated

8x8x48 ECT-48 Adjustable Double Wall Telescoping Inner Boxes 15-Pack

PN: T8848INNERDW

8 x 8 x 48 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$139.49 / BUNDLE
IN STOCK Ship tall items with confidence using our 8x8x48 ECT-32 kraft corrugated boxes. End-loading design enables fast, efficient packing of rods, trophies, and shelving units. Bundle of 20 ships flat to maximize your warehouse space and reduce freight costs.
Boxes - Corrugated

8x8x48 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 8848

8 x 8 x 48 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$78.97 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 6
Boxes - Corrugated

6x6x50 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 6650

6 x 6 x 50 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$128.98 / BUNDLE
IN STOCK Ship tall items efficiently with these 20x20x36
Boxes - Corrugated

20x20x36 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 202036

20 x 20 x 36 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$71.98 / BUNDLE
IN STOCK Adjustable telescoping outer boxes designed for tall and irregularly shaped items. 16.5x16.5x40
Boxes - Corrugated

16.5x16.5x40 ECT-32 Kraft Telescoping Outer Boxes 10-Pack

PN: T161640OUTER

16 1/2 x 16 1/2 x 40 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$74.28 / BUNDLE
IN STOCK Adjustable two-piece telescoping outer boxes designed for tall, irregularly shaped items up to 48
Boxes - Corrugated

8.5x8.5x48 ECT-32 Kraft Adjustable Telescoping Outer Boxes 20-Pack

PN: T8848OUTER

8 1/2 x 8 1/2 x 48 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$75.35 / BUNDLE
IN STOCK Specialized 36x21x20 corrugated wardrobe boxes designed to ship or store garments while still hanging on their bars–eliminating costly folding labor and damage. ECT-32 single-wall kraft construction delivers durability for retail logistics and relocation. Sold in convenient bundles of 5 with orientation arrows and delivery panels pre-printed.
Boxes - Corrugated

36x21x20 ECT-32 Kraft Wardrobe Boxes 5-Pack

PN: 362120

36 x 21 x 20 in ECT-32 Single Wall Corrugated 5 PER BUNDLE
$36.91 / BUNDLE
IN STOCK Engineered for height-critical shipments: ECT-48 double wall telescoping outer cartons with adjustable two-piece design fit tall and irregular products precisely. FOL reinforced bottom delivers superior stacking strength. Bundle of 15 kraft corrugated boxes ready to pair with matching inner cartons.
Boxes - Corrugated

8.75x8.75x48 ECT-48 Double Wall Telescoping Outer Boxes 15-Pack

PN: T8848OUTERDW

8 3/4 x 8 3/4 x 48 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$154.04 / BUNDLE
IN STOCK Ship or store garments directly on hangers with zero rehandling. These 36
Boxes - Corrugated

36x21x10 ECT-32 Kraft Wardrobe Box 10-Pack

PN: 362110

36 x 21 x 10 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$84.67 / BUNDLE
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 ECT-51 Double Wall Corrugated Boxes 5-Pack

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 5-Pack

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 ECT-32 Kraft Corrugated Shipping Boxes 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

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 Shipping Boxes 20-Pack

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 Shipping Boxes 10-Pack

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 ECT-32 Kraft Telescoping Inner Box 10-Pack

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 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 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 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 ECT-32 Kraft Corrugated Shipping Boxes 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 ECT-32 Kraft Corrugated Shipping Boxes 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 5-Pack

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 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 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 ECT-32 Kraft Telescoping Outer Boxes 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 ECT-32 Kraft Telescoping Outer Box 20-Pack

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 ECT-32 Kraft Corrugated Shipping Boxes 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 ECT-32 Kraft Corrugated Shipping Boxes 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 ECT-32 Kraft Corrugated Shipping Boxes 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 ECT-32 Kraft Corrugated Shipping Boxes 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 ECT-32 Kraft Corrugated Shipping Boxes 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 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 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 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 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 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 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 Kraft Double Wall Corrugated Boxes 5-Pack

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 ECT-32 Kraft Corrugated Shipping Boxes 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 ECT-32 Kraft Corrugated Shipping Boxes 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 ECT-32 Kraft Corrugated Shipping Boxes 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 ECT-32 Kraft Telescoping Inner Boxes 10-Pack

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 15-Pack

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 5-Pack

PN: HD402020DW

40 x 20 x 20 in ECT-48 Double Wall Corrugated 5 PER BUNDLE
$83.72 / 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

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Reorder

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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 ->