Large Cardboard Boxes (18"+)

IN STOCK Warehouse-tested 21x13x13 corrugated shipping boxes in ECT-32 kraft construction–the industry standard for mid-size product fulfillment. Each bundle of 20 ships and stores flat to maximize your warehouse space and reduce freight costs. Perfect for e-commerce, retail, and logistics operations.
Boxes - Corrugated

21x13x13 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 211313

21 x 13 x 13 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$76.55 / BUNDLE
IN STOCK Heavy-duty ECT-32 single wall corrugated boxes in 20x14x18
Boxes - Corrugated

20x14x18 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 201418

20 x 14 x 18 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$59.96 / BUNDLE
IN STOCK Industrial-grade ECT-32 kraft corrugated shipping boxes in 20x14x16
Boxes - Corrugated

20x14x16" ECT-32 Kraft Corrugated Boxes - Bundle of 20

PN: 201416

20 x 14 x 16 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$56.14 / BUNDLE
IN STOCK Eliminate multiple SKUs with one versatile 20x14x14 pre-scored corrugated box that folds to three different heights–perfect for warehouse managers cutting packaging inventory and parcel costs. ECT-32 kraft material delivers strength without carton sizers. Sold as a bundle of 15 boxes.
Boxes - Corrugated

20x14x14 Multi-Depth Corrugated Boxes ECT-32 Kraft - Adjustable Height, Bundle of 15

PN: MD201414

20 x 14 x 14 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$46.34 / BUNDLE
IN STOCK Heavy-duty ECT-32 kraft corrugated boxes sized 20
Boxes - Corrugated

20x14x14" ECT-32 Kraft Corrugated Boxes - Bulk Bundle of 20

PN: 201414

20 x 14 x 14 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$53.36 / BUNDLE
IN STOCK Dependable ECT-32 single-wall corrugated shipping boxes in 20
Boxes - Corrugated

20x14x8 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 20148

20 x 14 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$52.39 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes sized 20
Boxes - Corrugated

20x14x6 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 20146

20 x 14 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$45.84 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 20
Boxes - Corrugated

20x14x4 Kraft Corrugated Boxes ECT-32 Single Wall - Bundle of 25

PN: 20144

20 x 14 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$43.12 / BUNDLE
IN STOCK Shallow-depth 20x14x3
Boxes - Corrugated

20x14x3" ECT-32 Kraft Corrugated Boxes - Shallow Depth Shipping, Bundle of 25

PN: 20143

20 x 14 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$54.84 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes built for high-volume shipping and storage operations. These 18
Boxes - Corrugated

18x16x14 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 181614

18 x 16 x 14 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$70.92 / BUNDLE
IN STOCK ECT-32 single-wall corrugated construction delivers dependable protection for mid-sized shipments. These 18
Boxes - Corrugated

18x16x12 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 181612

18 x 16 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$66.70 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 18
Boxes - Corrugated

18x16x10 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 181610

18 x 16 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$48.59 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes with shallow 4
Boxes - Corrugated

18x16x4 Shipping Boxes - ECT-32 Kraft Corrugated, 25-Pack

PN: 18164

18 x 16 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$47.26 / BUNDLE
IN STOCK Optimize your fulfillment operation with these 18x16x2 ECT-32 kraft corrugated boxes engineered for shallow products. The compact 2-inch depth reduces dimensional weight charges while maintaining structural integrity through single-wall construction. Ships flat in bundles of 25 to maximize your warehouse storage and cut freight costs.
Boxes - Corrugated

18x16x2 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 18162

18 x 16 x 2 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$74.57 / BUNDLE
IN STOCK Ship flat panel TVs safely with these ECT-44 single-wall kraft corrugated boxes. Dimensions 28
Boxes - Corrugated

28x6x20" ECT-44 Kraft TV Box - Full Overlap Flaps, Bundle of 5

PN: 28620FPFOL

28 x 6 x 20 in ECT-44 Single Wall Corrugated 5 PER BUNDLE
$40.76 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 28x6x6
Boxes - Corrugated

28x6x6 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 2866

28 x 6 x 6 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$28.28 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 22
Boxes - Corrugated

22x12x6 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 22126

22 x 12 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$58.16 / BUNDLE
IN STOCK Heavy-duty ECT-32 corrugated boxes sized 20
Boxes - Corrugated

20x14x20 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 201420

20 x 14 x 20 in ECT-32-B Corrugated 20 PER BUNDLE
$106.61 / BUNDLE
IN STOCK Premium ECT-48 double wall corrugated boxes designed for demanding warehouse and fulfillment operations. These 20x14x14 kraft cartons deliver maximum stacking strength and impact protection, reducing damage claims and freight costs. Bundle of 15 ships flat to maximize your storage and logistics efficiency.
Boxes - Corrugated

20x14x14 ECT-48 Double Wall Corrugated Boxes - Heavy Duty Shipping, Bundle of 15

PN: HD201414DW

20 x 14 x 14 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$86.84 / BUNDLE
IN STOCK Professional-grade ECT-48 double wall corrugated boxes designed for demanding fulfillment operations. These 20x14x12 kraft cartons deliver maximum stacking strength and impact protection for mid-size shipments. Bundle of 15 ships flat to maximize your warehouse efficiency and reduce storage costs.
Boxes - Corrugated

20x14x12 ECT-48 Double Wall Corrugated Boxes - Heavy-Duty Kraft, Bundle of 15

PN: HD201412DW

20 x 14 x 12 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$91.25 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes in 20x14x10
Boxes - Corrugated

20x14x10 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 201410

20 x 14 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$45.62 / BUNDLE
IN STOCK Heavy-duty ECT-48 kraft corrugated boxes built for maximum stacking strength and impact protection. 20
Boxes - Corrugated

20x14x6 ECT-48 Corrugated Shipping Boxes, 15-Pack

PN: HD20146DW

20 x 14 x 6 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$72.57 / BUNDLE
IN STOCK Industrial-grade ECT-48 double wall corrugated boxes engineered for maximum stacking performance and freight efficiency. These 18x16x16 kraft cartons collapse flat for storage and ship in convenient bundles of 10, reducing your per-unit costs and warehouse footprint.
Boxes - Corrugated

18x16x16 ECT-48 Double Wall Corrugated Boxes - Heavy Duty Kraft, Bundle of 10

PN: HD181616DW

18 x 16 x 16 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$82.96 / BUNDLE
IN STOCK Industrial-grade 18
Boxes - Corrugated

18x16x16 Shipping Boxes - ECT-32 Kraft Corrugated, 20-Pack

PN: 181616

18 x 16 x 16 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$59.80 / BUNDLE
IN STOCK Industrial-grade 18x16x14 double wall corrugated boxes with ECT-48 strength rating–built for demanding fulfillment and warehouse operations. Kraft construction maximizes durability while flat-ship design cuts storage footprint by up to 80%. Bundle of 15 boxes ready for immediate deployment.
Boxes - Corrugated

18x16x14 ECT-48 Double Wall Boxes - Heavy Duty Kraft Corrugated, 15-Pack

PN: HD181614DW

18 x 16 x 14 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$115.49 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes measuring 18
Boxes - Corrugated

18x16x8 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 18168

18 x 16 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$62.98 / BUNDLE
IN STOCK These 18
Boxes - Corrugated

18x16x6 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 18166

18 x 16 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$52.39 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 16
Boxes - Corrugated

16x16x18 Shipping Boxes - ECT-32 Kraft Corrugated, 25-Pack

PN: 161618

16 x 16 x 18 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$74.69 / BUNDLE
IN STOCK Dependable 14x14x20 corrugated boxes engineered for mid-weight industrial shipping. ECT-32 kraft construction delivers consistent stacking strength and freight efficiency. Recyclable corrugated cartons sold in convenient 20-box bundles–reduce per-unit costs with volume purchasing.
Boxes - Corrugated

14x14x20 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 141420

14 x 14 x 20 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$52.59 / BUNDLE
IN STOCK 10x10x24 ECT-32 Kraft Corrugated Boxes - Bundle of 25
Boxes - Corrugated

10x10x24 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 101024

10 x 10 x 24 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$47.61 / BUNDLE
IN STOCK Heavy-duty 4x4x30 tall corrugated boxes made from ECT-32 kraft for secure shipping of long items like fishing rods, shelving, and trophies. End-loading design enables quick packing and sealing. Sold flat in bundles of 25 to maximize warehouse efficiency and reduce freight costs.
Boxes - Corrugated

4x4x30 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 4430

4 x 4 x 30 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$39.72 / BUNDLE
IN STOCK ECT-32 kraft corrugated side loading boxes in 28x5x24
Boxes - Corrugated

28x5x24 Kraft ECT-32 Side Loading Boxes - Bundle of 10

PN: 28524FOL

28 x 5 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$46.96 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes designed for warehouse managers and fulfillment directors who need maximum protection and stacking performance. These 20
Boxes - Corrugated

20x14x10 Double Wall Corrugated Boxes ECT-48 Kraft - Bundle of 15

PN: HD201410DW

20 x 14 x 10 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$84.84 / BUNDLE
IN STOCK ECT-32 kraft corrugated side loading boxes engineered for fast, efficient product insertion. Each 30x5x24
Boxes - Corrugated

30x5x24 ECT-32 Kraft Side Loading Boxes - Full Overlap, Bundle of 10

PN: 30524FOL

30 x 5 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$34.82 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 21
Boxes - Corrugated

21x14x14 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 211414

21 x 14 x 14 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$54.31 / BUNDLE
IN STOCK Heavy-duty 21x14x10 corrugated boxes engineered for high-volume shipping and storage. ECT-32 kraft construction delivers superior stacking strength and crush resistance. Buy by the bundle of 20 and reduce per-unit costs while maximizing freight efficiency.
Boxes - Corrugated

21x14x10" ECT-32 Kraft Corrugated Boxes - Durable Shipping, Bundle of 20

PN: 211410

21 x 14 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$46.43 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 20
Boxes - Corrugated

20x15x15 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 201515

20 x 15 x 15 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$55.27 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes sized 20
Boxes - Corrugated

20x15x12" ECT-32 Kraft Corrugated Boxes - Standard Strength Shipping, 25-Pack

PN: 201512

20 x 15 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$65.50 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes sized 20
Boxes - Corrugated

20x15x9 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 20159

20 x 15 x 9 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$61.15 / BUNDLE
IN STOCK Maximize freight efficiency with these 20x15x6
Boxes - Corrugated

20x15x6" ECT-32 Kraft Corrugated Boxes - Shallow Depth Shipping, Bundle of 25

PN: 20156

20 x 15 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$54.57 / BUNDLE
IN STOCK ECT-48 double wall corrugated boxes built for heavy loads and repeated handling. These 16
Boxes - Corrugated

16x16x18 ECT-48 Double Wall Boxes - Heavy Duty Kraft Cartons, Bundle of 15

PN: HD161618DW

16 x 16 x 18 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$107.35 / BUNDLE
IN STOCK Industrial-grade 20x15x10
Boxes - Corrugated

20x15x10 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 201510

20 x 15 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$47.79 / BUNDLE
IN STOCK Ship and store with confidence using these 15x15x20 corrugated boxes built from ECT-32 kraft material. Each bundle contains 25 boxes ideal for mid-weight products, offering reliable stacking strength and freight efficiency. Recyclable kraft construction reduces your environmental footprint while keeping costs down.
Boxes - Corrugated

15x15x20 Shipping Boxes - ECT-32 Kraft Corrugated, 25-Pack

PN: 151520

15 x 15 x 20 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$73.34 / BUNDLE
IN STOCK Ship tall items efficiently with 6x6x29 corrugated boxes featuring ECT-32 kraft construction and end-load design for quick insertion and sealing. This 25-pack bundle of tall cardboard boxes ships flat to maximize freight efficiency and minimize storage footprint. Ideal replacement for mailing tubes when shipping trophies, fishing rods, shelving, and other elongated products.
Boxes - Corrugated

6x6x29 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 6629

6 x 6 x 29 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$64.32 / BUNDLE
IN STOCK Ship and store flat to cut your warehouse footprint in half. These 18x18x3
Boxes - Corrugated

18x18x3" ECT-32 Kraft Corrugated Boxes - Bundle of 25

PN: 18183

18 x 18 x 3 in ECT-32 Corrugated 25 PER BUNDLE
$82.13 / BUNDLE
IN STOCK Reliable ECT-32 kraft corrugated boxes sized 16
Boxes - Corrugated

16x16x19 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 161619

16 x 16 x 19 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$83.11 / BUNDLE
IN STOCK Ideal for fulfillment operations shipping shallow products, these 22
Boxes - Corrugated

22x14x4 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 22144

22 x 14 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$72.94 / BUNDLE
IN STOCK Professional-grade 20x16x14
Boxes - Corrugated

20x16x14" ECT-44 Heavy-Duty Kraft Corrugated Boxes - Bundle of 15

PN: HD201614

20 x 16 x 14 in ECT-44 Single Wall Corrugated 15 PER BUNDLE
$57.30 / 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 ->