Large Cardboard Boxes (18"+)

IN STOCK Adjustable two-piece telescoping outer cartons designed for tall and irregularly shaped items. ECT-32 kraft corrugated with full overlap bottom for maximum stacking strength. Sold as bundle of 25–pair with T4448INNER for complete packaging solution.
Boxes - Corrugated

4.5x4.5x48 ECT-32 Kraft Corrugated Telescoping Outer Box 25-Pack

PN: T4448OUTER

4 1/2 x 4 1/2 x 48 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$67.60 / BUNDLE
IN STOCK Ship and store flat without sacrificing strength. These 42x11x6 ECT-32 kraft corrugated boxes deliver industry-standard durability in a bundle of 20 units. Perfect for high-volume fulfillment operations seeking to maximize freight efficiency and warehouse space savings.
Boxes - Corrugated

42x11x6 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 42116

42 x 11 x 6 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$100.90 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes built for serious volume. These 29x24x24 shipping cartons deliver industry-standard stacking strength and collapse-resistant performance. Ships flat in bundles of 10 to maximize your warehouse footprint and cut freight costs.
Boxes - Corrugated

29x24x24 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 292424

29 x 24 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$136.54 / BUNDLE
IN STOCK Heavy-duty ECT-32 corrugated boxes sized 5
Boxes - Corrugated

5x5x48 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 5548

5 x 5 x 48 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$95.98 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 36
Boxes - Corrugated

36x18x6 ECT-32 Kraft Corrugated Boxes 15-Pack

PN: 36186

36 x 18 x 6 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$95.68 / BUNDLE
IN STOCK Heavy-duty ECT-32 kraft corrugated boxes sized 30
Boxes - Corrugated

30x24x20 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 15-Pack

PN: 302420

30 x 24 x 20 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$136.63 / BUNDLE
IN STOCK Adjustable two-piece telescoping inner boxes designed for tall and irregularly shaped items up to 48 inches. ECT-32 kraft corrugated with reinforced FOL bottom delivers reliable protection and compression strength. Sold as a 25-pack bundle–pair with T6648OUTER outer cartons to complete your shipping set.
Boxes - Corrugated

6x6x48 ECT-32 Kraft Telescoping Inner Boxes 25-Pack

PN: T6648INNER

6 x 6 x 48 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$87.35 / BUNDLE
IN STOCK Adjustable 48x6x38
Boxes - Corrugated

48x6x38 ECT-44 Kraft Telescoping Boxes Heavy-Duty 10-Pack

PN: T48638INHD

48 x 6 x 38 in ECT-44 Corrugated 10 PER BUNDLE
$189.42 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 48x6x6 kraft corrugated boxes featuring wide lengthwise openings for fast packing. Built from durable ECT-32 single-wall corrugated material and sold in bundles of 25, these long cartons reduce per-unit costs while maintaining structural integrity. Perfect for wine bottles, umbrellas, carpet rolls, and specialty items.
Boxes - Corrugated

48x6x6 ECT-32 Kraft Corrugated Long Shipping Boxes 25-Pack

PN: 4866

48 x 6 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$106.17 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes in 36x18x18
Boxes - Corrugated

36x18x18 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 361818

36 x 18 x 18 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$85.98 / BUNDLE
IN STOCK Industrial-grade 36x18x12 corrugated shipping boxes built from ECT-32 kraft material for dependable strength and compression resistance. Each bundle contains 15 boxes–the standard pack size for warehouse managers and fulfillment operations. Recyclable, cost-effective, and engineered for efficient pallet loading.
Boxes - Corrugated

36x18x12 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 361812

36 x 18 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$71.51 / BUNDLE
IN STOCK Heavy-duty ECT-44 multi-depth corrugated boxes (30x24x24
Boxes - Corrugated

30x24x24 ECT-44 Heavy-Duty Multi-Depth Corrugated Shipping Boxes 10-Pack

PN: MDHD302424

30 x 24 x 24 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$117.73 / BUNDLE
IN STOCK Score multiple depths without a carton sizer–fold these 30x24x12 ECT-32 kraft corrugated boxes to your exact height requirements. Eliminate SKU bloat, cut parcel shipping costs, and standardize on one versatile box. Sold in bundles of 15.
Boxes - Corrugated

30x24x12 ECT-32 Kraft Adjustable Multi-Depth Corrugated Shipping Box 15-Pack

PN: MD302412

30 x 24 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$111.30 / BUNDLE
IN STOCK Ship and store with confidence using our 30x24x10 corrugated boxes (15-pack bundle). ECT-32 single-wall kraft construction delivers dependable stacking strength and impact protection for mid-weight industrial shipments. Recyclable cardboard design reduces waste while maintaining performance standards.
Boxes - Corrugated

30x24x10 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 302410

30 x 24 x 10 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$97.48 / BUNDLE
IN STOCK Adjustable telescoping inner boxes designed for tall and irregularly shaped shipments. ECT-32 single wall kraft corrugated with FOL bottom reinforcement ensures stack strength during transport. Sold as bundle of 15–pair with T141440OUTER carton to complete your two-piece shipping system.
Boxes - Corrugated

14x14x40 ECT-32 Kraft Corrugated Telescoping Inner Boxes 15-Pack

PN: T141440INNER

14 x 14 x 40 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$90.01 / BUNDLE
IN STOCK Ship long items efficiently with 40x14x14 long corrugated boxes featuring wide lengthwise openings for fast packing. ECT-32 kraft construction provides reliable stacking strength, and the 15-box bundle maximizes your freight efficiency–ideal for wine bottles, umbrellas, carpet rolls, and similar elongated products.
Boxes - Corrugated

40x14x14 ECT-32 Kraft Long Corrugated Shipping Boxes 15-Pack

PN: 401414

40 x 14 x 14 in ECT-32 Corrugated 15 PER BUNDLE
$117.67 / BUNDLE
IN STOCK Protect high-value shipments with ECT-48 double wall corrugated construction rated for maximum stacking performance and freight durability. These heavy-duty 36x18x18 kraft boxes deliver superior edge crush strength ideal for warehouse and fulfillment operations. Sold in convenient bundles of 10 and ship flat to minimize storage footprint and reduce inbound freight costs.
Boxes - Corrugated

36x18x18 ECT-48 Double Wall Corrugated Boxes 10-Pack

PN: HD361818DW

36 x 18 x 18 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$156.81 / BUNDLE
IN STOCK Protect high-value shipments with ECT-48 double wall corrugated cartons rated for maximum stacking strength and durability. These 36
Boxes - Corrugated

36x18x12 ECT-48 Kraft Double Wall Corrugated Boxes 10-Pack

PN: HD361812DW

36 x 18 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$127.87 / BUNDLE
IN STOCK ECT-44 single wall kraft corrugated boxes sized 36
Boxes - Corrugated

36x6x42 ECT-44 Kraft Side Loading Boxes 5-Pack

PN: HD36642FOL

36 x 6 x 42 in ECT-44 Single Wall Corrugated 5 PER BUNDLE
$55.55 / BUNDLE
IN STOCK Maximize shipment protection with ECT-48 heavy-duty double wall corrugated boxes sized 30x24x12–engineered for superior stacking strength and compression resistance. Kraft kraft construction absorbs impact while flat-shipped bundles of 10 minimize your storage footprint and freight costs. Built for warehouse managers who demand reliable performance at scale.
Boxes - Corrugated

30x24x12 ECT-48 Double Wall Corrugated Boxes 10-Pack

PN: HD302412DW

30 x 24 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$95.22 / BUNDLE
IN STOCK Heavy-duty 24x24x30 corrugated shipping boxes with ECT-32 kraft construction for reliable protection and maximum stack strength. This 10-pack bundle delivers warehouse-ready performance at volume pricing. Fully recyclable kraft material meets sustainability standards.
Boxes - Corrugated

24x24x30 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 242430

24 x 24 x 30 in ECT-32 Corrugated 10 PER BUNDLE
$77.07 / BUNDLE
IN STOCK Ship tall items efficiently with our 18x18x36 ECT-32 kraft corrugated boxes. End-loading design speeds up packing and sealing. Sold as bundles of 10 flat for maximum freight efficiency and storage savings.
Boxes - Corrugated

18x18x36 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 181836

18 x 18 x 36 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$59.68 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes designed for vertical storage and side loading operations. 8x4x46
Boxes - Corrugated

8x4x46 ECT-32 Kraft Full Overlap Side Loading Box 15-Pack

PN: 8446FOL

8 x 4 x 46 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$67.31 / BUNDLE
IN STOCK Adjustable two-piece telescoping inner boxes designed for tall and irregularly shaped items. 6
Boxes - Corrugated

6x6x48 ECT-48 Kraft Double Wall Telescoping Inner Boxes 15-Pack

PN: T6648INNERDW

6 x 6 x 48 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$116.44 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 6x6x48 dimensions ship in bundles of 25 flat for maximum freight efficiency. End-loading design accommodates tall items like shelving, rods, and trophies with superior stacking strength. Replace expensive mailing tubes at a fraction of the cost.
Boxes - Corrugated

6x6x48 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 6648

6 x 6 x 48 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$72.31 / BUNDLE
IN STOCK ECT-51 double wall corrugated cartons engineered for flat panel TV shipment. 46x8x30
Boxes - Corrugated

46x8x30 ECT-51 Double Wall TV Box 5-Pack

PN: 46830FPFOL

46 x 8 x 30 in ECT-51 Double Wall Corrugated 5 PER BUNDLE
$130.63 / BUNDLE
IN STOCK ECT-32 single-wall corrugated boxes sized 30
Boxes - Corrugated

30x24x12 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 302412

30 x 24 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$89.26 / BUNDLE
IN STOCK Heavy-duty 24 x 18 x 36 corrugated shipping boxes with ECT-32 single wall construction deliver reliable stacking performance and freight efficiency. Kraft corrugated cartons ship and store flat to maximize warehouse space and reduce logistics costs. Bundle of 10 boxes–the industry standard for mid-sized fulfillment operations.
Boxes - Corrugated

24x18x36 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 241836

24 x 18 x 36 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$116.85 / BUNDLE
IN STOCK Engineered for tall and irregularly shaped shipments, these 14.5x14.5x40
Boxes - Corrugated

14.5x14.5x40 ECT-32 Kraft Telescoping Outer Boxes 15-Pack

PN: T141440OUTER

14 1/2 x 14 1/2 x 40 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$93.88 / BUNDLE
IN STOCK Ship tall items efficiently with our 14x14x40 corrugated boxes–ECT-32 kraft single-wall construction rated for stacking and freight durability. End-loading design streamlines your packing workflow. Bundle of 15 ships flat to maximize warehouse storage and reduce freight spend.
Boxes - Corrugated

14x14x40 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 141440

14 x 14 x 40 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$86.24 / BUNDLE
IN STOCK Adjustable two-piece telescoping outer boxes designed for tall and irregularly shaped items. ECT-32 single-wall kraft corrugated with full overlap bottom for maximum stacking strength. Sold as bundle of 25–pair with T6648INNER for a complete set.
Boxes - Corrugated

6.5x6.5x48 ECT-32 Kraft Telescoping Outer Boxes 25-Pack

PN: T6648OUTER

6 1/2 x 6 1/2 x 48 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$80.89 / BUNDLE
IN STOCK Heavy-duty ECT-32 kraft corrugated boxes in 4
Boxes - Corrugated

4x4x50 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4450

4 x 4 x 50 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$84.98 / BUNDLE
IN STOCK Ship or store garments without removing from hangers using these heavy-duty ECT-48 double-wall wardrobe boxes. 24
Boxes - Corrugated

24x20x34 ECT-48 Corrugated Shipping Boxes 5-Pack

PN: 242034WARD

24 x 20 x 34 in ECT-48 Double Wall Corrugated 5 PER BUNDLE
$94.41 / BUNDLE
IN STOCK Adjust height to fit tall and irregular items with this two-piece telescoping outer box. ECT-32 kraft construction with full overlap bottom delivers reliable stacking strength and freight stability. Sold as bundle of 15–pair with T12448INNER to complete your shipping solution.
Boxes - Corrugated

12.5x4.5x48 ECT-32 Kraft Adjustable Telescoping Outer Boxes 15-Pack

PN: T12448OUTER

12 1/2 x 4.5 x 48 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$105.05 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 34x21x6
Boxes - Corrugated

34x21x6 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 34216

34 x 21 x 6 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$75.57 / BUNDLE
IN STOCK Ship heavier loads safely with ECT-48 double wall corrugated boxes built for maximum stacking strength and freight efficiency. These 24x24x30 kraft cartons deliver superior cushioning and structural integrity for demanding warehouse operations. Bundle of 5 ships flat to maximize storage space and reduce shipping costs.
Boxes - Corrugated

24x24x30 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 5-Pack

PN: HD242430DW

24 x 24 x 30 in ECT-48 Double Wall Corrugated 5 PER BUNDLE
$90.00 / BUNDLE
IN STOCK Engineered for tall and irregularly shaped items, these 6.75x6.75x48 double wall telescoping cartons feature an adjustable two-piece design with FOL bottom reinforcement. ECT-48 kraft corrugated construction rated for heavy stacking. Sold in bundles of 15 outer boxes (pair with T6648INNERDW inner cartons to complete your set).
Boxes - Corrugated

6.75x6.75x48 ECT-48 Double Wall Telescoping Boxes 15-Pack

PN: T6648OUTERDW

6 3/4 x 6 3/4 x 48 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$129.43 / BUNDLE
IN STOCK Industrial-grade 6x6x48 double wall corrugated boxes manufactured from ECT-48 kraft material deliver maximum stacking strength and impact protection for demanding fulfillment operations. Each bundle of 15 ships flat, cutting storage footprint and freight costs. Purpose-built for warehouse managers who need reliable, high-performance shipping cartons without compromise.
Boxes - Corrugated

6x6x48 ECT-48 Kraft Heavy Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD6648DW

6 x 6 x 48 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$97.26 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes designed for maximum protection and stacking performance in high-volume fulfillment environments. Each 48x12x12 kraft carton delivers superior crush resistance and freight efficiency. Sold in bundles of 10 and ship flat to reduce warehouse storage footprint.
Boxes - Corrugated

48x12x12 ECT-48 Kraft Heavy-Duty Corrugated Double Wall Shipping Boxes 10-Pack

PN: HD481212DW

48 x 12 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$122.26 / BUNDLE
IN STOCK Ship tall items efficiently with our 5x5x50 corrugated boxes in ECT-32 kraft material. End-load design for fast, secure packing of fishing rods, trophies, shelving, and more. Bundle of 25 boxes ships flat to maximize freight savings.
Boxes - Corrugated

5x5x50 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 5550

5 x 5 x 50 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$99.30 / BUNDLE
IN STOCK ECT-44 single wall kraft corrugated side loading boxes designed for warehouse efficiency and maximum freight optimization. 40
Boxes - Corrugated

40x5x45 ECT-44 Kraft Side Loading Boxes 10-Pack

PN: HD40545FOL

40 x 5 x 45 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$179.29 / BUNDLE
IN STOCK ECT-32 kraft telescoping inner boxes engineered for tall and irregularly shaped shipments. 8
Boxes - Corrugated

8x8x48 ECT-32 Kraft Telescoping Inner Boxes 20-Pack

PN: T8848INNER

8 x 8 x 48 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$68.97 / BUNDLE
IN STOCK Maximize your fulfillment efficiency with these 48x8x24 ECT-44 kraft corrugated side loading boxes. Ship and store flat to reduce warehouse footprint and freight costs by up to 40%. Bundle of 10 ready-to-assemble cartons designed for high-volume operations.
Boxes - Corrugated

48x8x24 ECT-44 Kraft Side Loading Boxes 10-Pack

PN: HD48824FOL

48 x 8 x 24 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$150.25 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 48x8x8 ECT-32 kraft corrugated boxes. Wide lengthwise openings reduce packing time and labor costs. Sold flat in bundles of 20 for maximum freight efficiency and storage savings.
Boxes - Corrugated

48x8x8 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 4888

48 x 8 x 8 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$72.19 / BUNDLE
IN STOCK ECT-32 single-wall corrugated boxes sized 36
Boxes - Corrugated

36x20x9 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 36209

36 x 20 x 9 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$130.23 / BUNDLE
IN STOCK ECT-44 heavy-duty multi-depth kraft corrugated cartons deliver 40% greater stacking strength than standard shipping containers. Pre-scored sides adjust from full 32x24x24 depth down to smaller profiles–one SKU replaces multiple box sizes, cutting inventory and storage overhead. Includes 10 flat-packed boxes per bundle.
Boxes - Corrugated

32x24x24 ECT-44 Heavy-Duty Multi-Depth Corrugated Shipping Boxes 10-Pack

PN: MDHD322424

32 x 24 x 24 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$99.61 / BUNDLE
IN STOCK Heavy-duty ECT-32 kraft corrugated boxes built for industrial warehouse and fulfillment operations. These 28x28x12 shipping cartons deliver reliable stacking strength and freight efficiency in convenient bundles of 10. Recyclable material supports sustainable packaging practices.
Boxes - Corrugated

28x28x12 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 282812

28 x 28 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$66.20 / BUNDLE
IN STOCK Professional-grade 28
Boxes - Corrugated

28x28x8 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 28288

28 x 28 x 8 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$113.95 / 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 ->