Large Cardboard Boxes (18"+)

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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Heavy-Duty Kraft Corrugated Boxes - Bundle of 20

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" White Corrugated Box ECT-32 Single Wall Bundle 20

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 Shipping Boxes - Multi-Depth ECT-32 Kraft Corrugated, 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 Shipping Boxes - ECT-32 Kraft Corrugated, 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 Heavy-Duty ECT-44 Kraft Corrugated Boxes - Bundle of 25

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 Double Wall Corrugated Boxes - Heavy-Duty Kraft, Bundle of 15

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 Double Wall Corrugated Boxes - Heavy Duty Kraft, 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 Double Wall Kraft Boxes - Heavy-Duty Shipping (Bundle of 15)

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 Shipping Boxes - ECT-32 Kraft Corrugated, 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 Side Loading Boxes - Full Overlap FOL, 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 Shipping Boxes - ECT-32 Kraft Corrugated, 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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Shipping Boxes - ECT-32 Kraft Corrugated, 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 - Bundle of 10

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 - Bundle of 20

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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Double Wall Shipping Boxes - Heavy-Duty Kraft, 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 Double Wall Shipping Boxes - Heavy Duty, Bundle of 15

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 - Bundle of 10

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 Double Wall Kraft Boxes - Bundle of 10

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 Boxes (Bundle of 10)

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 Boxes w/ Hand Holes - Bundle of 10

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 Double Wall Corrugated Boxes - Heavy Duty Kraft, Bundle of 10

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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 Shipping Boxes — ECT-32 Kraft Corrugated, 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 - Adjustable 2-Piece Design, Bundle of 10

PN: T30624OUTER

30 1/2 x 6.5 x 24 in ECT-32 Corrugated 10 PER BUNDLE
$57.08 / BUNDLE
IN STOCK ECT-90 triple wall corrugated construction delivers industrial-grade protection for high-volume shipping and storage. These 18
Boxes - Corrugated

18x18x18" ECT-90 Triple Wall Corrugated Boxes - Heavy-Duty Shipping, Bundle of 5

PN: HD181818TW

18 x 18 x 18 in ECT-90 Triple Wall Corrugated 5 PER BUNDLE
$187.43 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 32x6x6 ECT-32 kraft corrugated boxes. Wide length openings reduce packing time and damage risk. Sold as a bundle of 25 boxes–maximize your freight efficiency without over-packaging.
Boxes - Corrugated

32x6x6 Shipping Boxes - ECT-32 Kraft Corrugated, 25-Pack

PN: 3266

32 x 6 x 6 in ECT-32 Corrugated 25 PER BUNDLE
$39.58 / BUNDLE
IN STOCK Ship long, narrow items efficiently with our 30x8x8 corrugated boxes made from ECT-32 kraft material. Wide opening along the length reduces packing time and labor costs. Sold as bundles of 25 and shipped flat to maximize freight efficiency.
Boxes - Corrugated

30x8x8 ECT-32 Kraft Corrugated Boxes - Long Item Shipping, 25-Box Bundle

PN: 3088

30 x 8 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$45.39 / BUNDLE
IN STOCK ECT-32 single wall corrugated boxes sized 24
Boxes - Corrugated

24x14x14" ECT-32 Kraft Corrugated Boxes - Durable Shipping, Bundle of 15

PN: 241414

24 x 14 x 14 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$42.36 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes sized 24
Boxes - Corrugated

24x14x10 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 241410

24 x 14 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$51.15 / BUNDLE
IN STOCK Ship shallow products efficiently with 24x14x8 ECT-32 kraft corrugated boxes–the go-to choice for apparel, books, artwork, and lightweight items. Bundle of 20 ships flat to maximize warehouse space and cut freight costs. Reliable single-wall construction rated for consistent stacking performance.
Boxes - Corrugated

24x14x8 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 24148

24 x 14 x 8 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$46.70 / BUNDLE
IN STOCK Shallow-depth 24x14x6
Boxes - Corrugated

24x14x6" ECT-32 Kraft Corrugated Boxes - Shallow Depth, Bundle of 25

PN: 24146

24 x 14 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$54.65 / BUNDLE
IN STOCK Ship shallow products efficiently with our 24x14x4
Boxes - Corrugated

24x14x4 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 24144

24 x 14 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$48.05 / BUNDLE
IN STOCK Sturdy ECT-32 kraft corrugated boxes sized 22
Boxes - Corrugated

22x16x16 Shipping Boxes — ECT-32 Kraft Corrugated, 15-Pack

PN: 221616

22 x 16 x 16 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$50.29 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 22
Boxes - Corrugated

22x16x12" ECT-32 Kraft Corrugated Boxes - Bundle of 20

PN: 221612

22 x 16 x 12 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$78.48 / BUNDLE
IN STOCK Heavy-duty ECT-32 kraft corrugated boxes sized 22
Boxes - Corrugated

22x16x10 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 221610

22 x 16 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$54.72 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 22
Boxes - Corrugated

22x16x8 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack

PN: 22168

22 x 16 x 8 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$67.27 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated cartons with a 6
Boxes - Corrugated

22x16x6 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack

PN: 22166

22 x 16 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$97.45 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping cartons designed for shallow products and lightweight merchandise. Ship flat in bundles of 25 to maximize warehouse storage and minimize freight expenses. Perfect fit for apparel, books, artwork, and picture frames.
Boxes - Corrugated

22x16x4 Kraft Corrugated Boxes ECT-32 Single Wall - Bundle of 25

PN: 22164

22 x 16 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$85.59 / BUNDLE
IN STOCK Industrial-grade 20x18x18
Boxes - Corrugated

20x18x18" ECT-32 Kraft Corrugated Boxes - Bulk Pack of 15

PN: 201818

20 x 18 x 18 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$56.06 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 20
Boxes - Corrugated

20x18x16 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 201816

20 x 18 x 16 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$35.73 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 20
Boxes - Corrugated

20x18x14" ECT-32 Kraft Corrugated Boxes - Bundle of 10

PN: 201814

20 x 18 x 14 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$34.26 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes designed for warehouse efficiency and reliable mid-weight shipments. 20x18x12 dimensions provide optimal stacking performance and freight versatility. Sold as a convenient bundle of 10 to streamline your bulk ordering.
Boxes - Corrugated

20x18x12 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 201812

20 x 18 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$32.32 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes in 20x18x10 dimensions deliver reliable standard strength performance for mid-weight products and general fulfillment. Each bundle of 10 boxes provides tested stacking durability and cost-effective inventory management. Fully recyclable kraft material supports sustainable warehouse operations.
Boxes - Corrugated

20x18x10 Shipping Boxes — ECT-32 Kraft Corrugated, 10-Pack

PN: 201810

20 x 18 x 10 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$29.42 / 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 ->