Large Cardboard Boxes (18"+)

IN STOCK Heavy-duty 18x18x10 corrugated shipping boxes engineered for demanding warehouse operations. ECT-32 single-wall kraft construction delivers reliable stacking performance and cost-effective volume shipping in convenient bundles of 20. Optimize your fulfillment costs with industrial-grade cardboard boxes built to protect and perform.
Boxes - Corrugated

18x18x10 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 20-Pack

PN: 181810

18 x 18 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$56.40 / BUNDLE
IN STOCK Engineered for high-volume fulfillment operations, these 18x18x8 corrugated boxes deliver ECT-32 single-wall durability in an efficient mid-size format. Perfect for medium-weight products, seasonal storage, and freight optimization. Kraft construction is 100% recyclable–reduce waste while shipping smarter.
Boxes - Corrugated

18x18x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 18188

18 x 18 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$65.17 / BUNDLE
IN STOCK Reduce carton inventory and shipping costs with these pre-scored, adjustable 18x18x6 multi-depth corrugated boxes. Fold to 6, 5, 4, 3, or 2-inch heights without a carton sizer. Made from durable ECT-32 kraft corrugated. Sold as a bundle of 20.
Boxes - Corrugated

18x18x6 ECT-32 Kraft Adjustable Multi-Depth Corrugated Shipping Boxes 20-Pack

PN: MD18186

18 x 18 x 6 in ECT-32 Corrugated 20 PER BUNDLE
$49.55 / BUNDLE
IN STOCK Ship smarter with these 18x18x6 shallow-depth corrugated boxes made from ECT-32 kraft material. Bundle of 20 ships flat to save on storage and freight costs. Ideal for electronics, PC components, and compact products that don't need deep cartons.
Boxes - Corrugated

18x18x6 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 18186

18 x 18 x 6 in ECT-32 Corrugated 20 PER BUNDLE
$43.49 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes engineered for shallow-depth products that demand reliable protection without excess material waste. These 18x18x5 cartons ship flat to maximize storage and freight efficiency–25 boxes per bundle. Ideal for apparel, books, picture frames, artwork, and mirrors.
Boxes - Corrugated

18x18x5 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 18185

18 x 18 x 5 in ECT-32 Corrugated 25 PER BUNDLE
$92.03 / BUNDLE
IN STOCK Ship smarter with these 18x18x4 shallow depth corrugated boxes manufactured from durable ECT-32 kraft material. Flat design ships compressed to cut storage and freight costs–perfect for apparel, books, artwork, and picture frames. Bundle of 25 boxes.
Boxes - Corrugated

18x18x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 18184

18 x 18 x 4 in ECT-32 Corrugated 25 PER BUNDLE
$55.39 / BUNDLE
IN STOCK Eliminate carton sizing complexity with these ECT-32 kraft corrugated boxes featuring multi-depth scoring at 6
Boxes - Corrugated

18x12x6 ECT-32 Multi-Depth Kraft Corrugated Shipping Boxes 25-Pack

PN: MD18126

18 x 12 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$41.78 / BUNDLE
IN STOCK Ship long and narrow items efficiently with these 28x8x8 ECT-32 kraft corrugated boxes. Wide openings along the length reduce packing time and handling errors. Sold flat in bundles of 25 for maximum freight efficiency and storage savings.
Boxes - Corrugated

28x8x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 2888

28 x 8 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$40.67 / BUNDLE
IN STOCK Optimize your shallow-product shipping with these 26x10x4 ECT-32 kraft corrugated boxes. The 4-inch depth reduces dimensional weight charges and warehouse footprint. Sold in bundles of 25 and ship flat for maximum storage and freight efficiency.
Boxes - Corrugated

26x10x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 26104

26 x 10 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$57.28 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes with integrated hand holes for ergonomic handling and efficient warehouse operations. 24
Boxes - Corrugated

24x12x12 ECT-48 Double Wall Hand Hole Boxes 15-Pack

PN: HD241212DWHH

24 x 12 x 12 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$85.89 / BUNDLE
IN STOCK Get superior protection and stacking performance with these ECT-44 heavy-duty corrugated boxes. The 24
Boxes - Corrugated

24x12x12 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD241212

24 x 12 x 12 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$87.11 / BUNDLE
IN STOCK Ship long, narrow items with confidence using these 24x12x12 ECT-32 kraft corrugated boxes. Each bundle includes 20 boxes with 2.0 cubic foot capacity and wide openings for fast packing. ECT-32 single wall construction delivers reliable stacking performance and freight efficiency for warehouse operations.
Boxes - Corrugated

24x12x12 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 241212

24 x 12 x 12 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$42.36 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes engineered for maximum protection and stacking performance. These 24x12x8 kraft cartons deliver superior compression strength for demanding warehouse and fulfillment operations. Bundle of 15 ships flat–reducing storage footprint and freight costs.
Boxes - Corrugated

24x12x8 ECT-48 Double Wall Corrugated Boxes 15-Pack

PN: HD24128DW

24 x 12 x 8 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$84.77 / BUNDLE
IN STOCK Dependable ECT-32 single-wall kraft corrugated boxes in 24
Boxes - Corrugated

24x12x8 ECT-32 Kraft Corrugated Boxes

PN: 24128R

24 x 12 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$56.11 / BUNDLE
IN STOCK Professional-grade 22x14x12 double wall corrugated boxes built from ECT-48 kraft material deliver superior stacking performance and transit protection. Each bundle of 15 ships flat, reducing storage footprint and freight costs. Ideal for e-commerce fulfillment, warehouse distribution, and high-volume shipping operations.
Boxes - Corrugated

22x14x12 ECT-48 Kraft Heavy Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD221412DW

22 x 14 x 12 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$86.21 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 22
Boxes - Corrugated

22x14x8 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 22148

22 x 14 x 8 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$43.85 / BUNDLE
IN STOCK Protect high-value shipments with ECT-48 kraft double wall corrugated boxes engineered for maximum stacking performance and freight efficiency. These 20x16x16 heavy-duty cartons deliver superior puncture and crush resistance. Order in bundles of 10–ships flat to maximize your warehouse space and reduce logistics costs.
Boxes - Corrugated

20x16x16 ECT-48 Double Wall Corrugated Boxes 10-Pack

PN: HD201616DW

20 x 16 x 16 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$52.96 / BUNDLE
IN STOCK ECT-48 double wall corrugated shipping boxes designed for warehouse professionals who demand maximum protection and freight efficiency. These 20
Boxes - Corrugated

20x16x12 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD201612DW

20 x 16 x 12 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$111.75 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes built for warehouse managers and fulfillment directors who need reliable, stackable shipping protection. These 20
Boxes - Corrugated

20x16x10 ECT-48 Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD201610DW

20 x 16 x 10 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$113.38 / BUNDLE
IN STOCK Industrial-grade 20x16x8 corrugated shipping boxes built from ECT-32 kraft material for dependable protection and stackability. Pack of 25 boxes delivers volume savings ideal for warehouse managers and fulfillment operations. Recyclable kraft construction supports sustainable packaging goals.
Boxes - Corrugated

20x16x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 20168

20 x 16 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$63.49 / BUNDLE
IN STOCK Optimize your shipping costs with these 20x16x6 ECT-32 kraft corrugated boxes–engineered for shallow products like apparel, books, frames, and artwork. Ships flat in bundles of 25, maximizing your warehouse storage and reducing freight expenses. Reliable single-wall construction rated for mid-weight items.
Boxes - Corrugated

20x16x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 20166

20 x 16 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$55.39 / BUNDLE
IN STOCK Heavy-duty ECT-44 single wall kraft corrugated boxes engineered for maximum stacking performance and impact protection. These 18x18x18
Boxes - Corrugated

18x18x18 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 20-Pack

PN: HD1818

18 x 18 x 18 in ECT-44 Single Wall Corrugated 20 PER BUNDLE
$92.73 / BUNDLE
IN STOCK ECT-32 single-wall corrugated boxes in clean white finish–5.3 cubic feet of dependable cube-shaped shipping capacity per box. Bundle of 20 offers maximum volume efficiency for warehouse fulfillment. Crisp white surface accepts printed labels and special instructions without compromise.
Boxes - Corrugated

18x18x18 ECT-32 White Corrugated Shipping Box Single Wall 20-Pack

PN: 181818W

18 x 18 x 18 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$96.67 / BUNDLE
IN STOCK Eliminate carton sizer equipment and reduce inventory complexity with these pre-scored ECT-32 kraft corrugated boxes. One SKU adjusts to multiple heights–fold to 18
Boxes - Corrugated

18x18x18 ECT-32 Multi-Depth Kraft Corrugated Shipping Boxes 20-Pack

PN: MD181818

18 x 18 x 18 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$67.59 / BUNDLE
IN STOCK Ship round and cylindrical items with confidence using these 18x18x18
Boxes - Corrugated

18x18x18 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 181818

18 x 18 x 18 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$59.76 / BUNDLE
IN STOCK Engineered for demanding warehouse operations, these 18x18x12 heavy-duty corrugated boxes feature ECT-44 single wall kraft construction–40% stronger than standard shipping containers. Maximize stacking performance and freight efficiency with superior burst strength. Sold flat in bundles of 25 for space-saving storage and consistent supply.
Boxes - Corrugated

18x18x12 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD181812

18 x 18 x 12 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$93.75 / BUNDLE
IN STOCK Heavy-duty ECT-48 kraft corrugated boxes deliver superior stacking strength and impact protection for demanding shipping and storage applications. These 18x18x10 double wall cartons are engineered for warehouse efficiency–bundle of 15 ships flat to maximize freight utilization and minimize storage footprint.
Boxes - Corrugated

18x18x10 ECT-48 Kraft Heavy-Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD181810DW

18 x 18 x 10 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$105.45 / BUNDLE
IN STOCK Industrial-grade 18x18x8 double wall corrugated boxes with ECT-48 kraft construction deliver maximum stacking strength and damage protection for high-volume shipping operations. Each bundle of 15 cartons ships flat to minimize storage footprint and reduce freight costs. Built for warehouse managers who demand reliable, heavy-duty packaging performance.
Boxes - Corrugated

18x18x8 ECT-48 Kraft Heavy Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD18188DW

18 x 18 x 8 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$64.72 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall kraft corrugated boxes designed for maximum stacking strength and freight protection. 18
Boxes - Corrugated

18x18x6 ECT-48 Kraft Double Wall Corrugated Boxes 15-Pack

PN: HD18186DW

18 x 18 x 6 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$80.97 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 16
Boxes - Corrugated

16x16x20 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 161620

16 x 16 x 20 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$65.05 / BUNDLE
IN STOCK Industry-standard 13x3x30 full overlap side loading boxes with ECT-32 single-wall corrugated construction. Ships and stores flat to maximize warehouse efficiency and reduce freight costs. Trusted by fulfillment directors nationwide–25-pack bundle ready to deploy.
Boxes - Corrugated

13x3x30 ECT-32 Full Overlap FOL Side Loading Boxes 25-Pack

PN: 13330FOL

13 x 3 x 30 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$103.04 / BUNDLE
IN STOCK End-load 12x12x24 tall corrugated boxes built from ECT-32 kraft material deliver reliable stacking strength and freight efficiency for irregular-shaped shipments. Holds 2.0 cubic feet per box. Sold as a bundle of 25 cartons ready to deploy in your warehouse operations.
Boxes - Corrugated

12x12x24 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 121224

12 x 12 x 24 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$60.57 / BUNDLE
IN STOCK Sturdy ECT-32 kraft corrugated boxes sized 6
Boxes - Corrugated

6x6x30 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 6630

6 x 6 x 30 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$51.96 / BUNDLE
IN STOCK Ship tall items with confidence using these 4x4x32 corrugated boxes made from sturdy ECT-32 kraft material. End-loading design speeds packing; sold flat in bundles of 25 for warehouse efficiency. Perfect replacement for mailing tubes when shipping shelving, fishing rods, trophies, and similar tall products.
Boxes - Corrugated

4x4x32 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4432

4 x 4 x 32 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$64.60 / BUNDLE
IN STOCK Industrial-grade ECT-44 kraft side loading cartons designed for high-volume fulfillment operations. 30x6x24
Boxes - Corrugated

30x6x24 ECT-44 Kraft Side Loading Boxes 10-Pack

PN: HD30624FOL

30 x 6 x 24 in ECT-44 Corrugated 10 PER BUNDLE
$89.33 / BUNDLE
IN STOCK ECT-32 single wall corrugated boxes engineered for demanding warehouse and fulfillment operations. These 24
Boxes - Corrugated

24x12.5x8 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 24128

24 x 12.5 x 8 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$41.49 / BUNDLE
IN STOCK Heavy-duty 24x12x24 corrugated shipping boxes built from ECT-32 kraft material for maximum stacking strength and freight efficiency. Each bundle contains 10 boxes sized for mid-weight products, providing reliable protection and sustainable packaging. Ideal for warehouses and fulfillment centers managing high-volume shipments.
Boxes - Corrugated

24x12x24 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 241224

24 x 12 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$38.48 / BUNDLE
IN STOCK ECT-48 double wall corrugated cartons engineered for maximum protection and stacking performance. These 24x12x12 kraft boxes handle high-volume fulfillment with rated strength for multi-tier warehouse storage. Bundle of 15 ships flat–reducing storage footprint and freight costs.
Boxes - Corrugated

24x12x12 ECT-48 Kraft Heavy-Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD241212DW

24 x 12 x 12 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$53.44 / BUNDLE
IN STOCK ECT-48 double wall corrugated boxes engineered for maximum protection and stacking performance. These 20
Boxes - Corrugated

20x16x14 ECT-48 Heavy Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD201614DW

20 x 16 x 14 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$75.05 / BUNDLE
IN STOCK Engineered for high-performance storage and shipping, these 18x18x18 corrugated boxes feature V3c 350# single-wall construction with water-resistant adhesive (WRA) for superior equipment protection. Military-specification rated, sold in bundles of 10 kraft boxes to maximize freight efficiency and reduce per-unit costs.
Boxes - Corrugated

18x18x18 V3c 350# Weather-Resistant Corrugated Boxes 10-Pack

PN: 181818V3C

18 x 18 x 18 in V3c - 350# Single Wall Corrugated 10 PER BUNDLE
$203.58 / BUNDLE
IN STOCK Industrial-grade ECT-48 double wall kraft corrugated boxes designed for demanding warehouse operations. 18
Boxes - Corrugated

18x18x16 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD181816DW

18 x 18 x 16 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$72.73 / BUNDLE
IN STOCK Heavy-duty ECT-71 double wall corrugated boxes designed for maximum stacking performance and freight efficiency in high-volume warehouse environments. 18x18x18
Boxes - Corrugated

18x18x18 ECT-71 Heavy-Duty Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD181818HDDW

18 x 18 x 18 in ECT-71 Double Wall Corrugated 10 PER BUNDLE
$160.72 / BUNDLE
IN STOCK Professional-grade 18x18x18 corrugated shipping boxes built from ECT-48 double wall kraft material for maximum durability and stacking performance. Integrated hand holes enable efficient manual handling and reduce fulfillment labor. Sold as a bundle of 10 boxes–ideal for warehouse managers requiring heavy-duty protection without sacrificing operational speed.
Boxes - Corrugated

18x18x18 ECT-48 Double Wall Corrugated Shipping Boxes w/ Hand Holes 10-Pack

PN: HD181818DWHH

18 x 18 x 18 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$84.78 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes built to protect high-value freight and maximize stacking efficiency in your warehouse. Each bundle includes 10 flat-shipped 18x18x18
Boxes - Corrugated

18x18x18 ECT-48 Kraft Heavy Duty Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD1818DW

18 x 18 x 18 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$54.80 / BUNDLE
IN STOCK Professional-grade ECT-32 kraft corrugated boxes sized 22
Boxes - Corrugated

22x15x15 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 221515

22 x 15 x 15 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$64.77 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 22
Boxes - Corrugated

22x15x10 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 221510

22 x 15 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$105.21 / BUNDLE
IN STOCK Durable ECT-32 kraft corrugated boxes sized 18½
Boxes - Corrugated

18.5x18.5x9 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 18189R

18 1/2 x 18 1/2 x 9 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$55.98 / BUNDLE
IN STOCK Adjustable 2-piece telescoping outer boxes engineered for tall and irregularly shaped items. ECT-32 kraft corrugated with full overlap (FOL) bottoms ensures maximum stacking strength and freight stability. Sold in bundles of 10–pair with T30624INNER inner cartons to complete your protective packaging system.
Boxes - Corrugated

30.5x6.5x24 ECT-32 Telescoping Outer Boxes 10-Pack

PN: T30624OUTER

30 1/2 x 6.5 x 24 in ECT-32 Corrugated 10 PER BUNDLE
$57.08 / 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 ->