Boxes & Mailers

SELECTION EXPERT ADVICE

Wall Strength & Load Capacity
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Match single-, double-, or triple-wall corrugated construction to your product weight to prevent in-transit damage and minimize costly returns.
Dimensional Weight Cost Control
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Right-sized boxes cut carrier DIM weight charges, selecting the optimal LxWxH for each SKU directly lowers your per-shipment freight cost.
Mailer Box vs. RSC: Choose Correctly
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Self-locking mailer boxes suit branded DTC shipments; traditional RSC corrugated boxes are ideal for palletized B2B and high-volume fulfillment.

Need help choosing boxes?

Pick the right corrugated box without overpaying for size or strength

Use these buying guides to size your box, compare board strength, and avoid dimensional weight surcharges.

Corrugated Boxes Guide → How to choose size, strength, and wall type Box Size Calculator → Find the smallest safe box for your product 32 ECT vs 200 lb Test → Which board strength rating fits your shipment
Overview

3,094 corrugated boxes, literature mailers and mailing tubes from 2 to 36 inches, mostly ECT-32 kraft and white, sold in bundles of 10 to 50. Each listing shows inside dimensions, board grade and bundle count so you can match a carton to the part you ship. Orders ship from five US regional warehouses; for mixed or recurring orders use the bulk quote path with SKU, quantity and destination ZIP.

Related collections

IN STOCK ECT-32 kraft corrugated long boxes designed for efficient packing of elongated items like wine bottles, umbrellas, and carpet rolls. 32x10x10" dimensions with wide openings along the length maximize loading speed and minimize damage. Sold as a bundle of 20 boxes, shipped flat to reduce warehouse footprint and freight spend.
Boxes - Corrugated

32x10x10 ECT-32 Kraft Corrugated Long Shipping Boxes 20-Pack

PN: 321010

32 x 10 x 10 in ECT-32 Corrugated 20 PER BUNDLE
$75.10 / BUNDLE
IN STOCK Specialized 32x10x6.5" corrugated shipping boxes designed for long, narrow items like wine bottles, umbrellas, and carpet rolls. ECT-32 kraft construction provides reliable protection with efficient long-side opening for fast packing. Sold flat in bundles of 20 to maximize warehouse storage and reduce freight costs.
Boxes - Corrugated

32x10x6.5 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 32106

32 x 10 x 6 1/2 in ECT-32 Corrugated 20 PER BUNDLE
$62.31 / BUNDLE
IN STOCK Ship shallow products efficiently with our 30x12x6 corrugated boxes made from durable ECT-32 kraft material. Each bundle of 25 ships flat to maximize your warehouse space and reduce freight spend. Ideal for apparel, books, frames, mirrors, and artwork.
Boxes - Corrugated

30x12x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 30126

30 x 12 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$89.79 / BUNDLE
IN STOCK Industrial-grade 26x16x16" corrugated shipping boxes with ECT-32 single wall construction deliver reliable stacking performance and load security. Bundle of 15 kraft cartons ships flat, reducing storage footprint and freight expenses. Built to the standards warehouse managers trust for consistent, cost-effective fulfillment operations.
Boxes - Corrugated

26x16x16 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 261616

26 x 16 x 16 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$89.09 / BUNDLE
IN STOCK Move, pack, and ship with confidence using these 24x18x24 deluxe packing boxes. ECT-32 kraft corrugated construction delivers superior stacking strength and durability. Bundle of 10 boxes with innovative flap tabs that keep flaps secure and out of the way–cutting packing time and labor costs.
Boxes - Corrugated

24x18x24 ECT-32 Kraft Deluxe Packing Boxes 10-Pack

PN: 241824DPB

24 x 18 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$72.88 / BUNDLE
IN STOCK Premium ECT-32 kraft corrugated boxes in 24x18x24" dimensions deliver 6 cubic feet of capacity per carton–perfect for oversized items like pillows and baskets. This bundle of 10 ships flat, reducing warehouse footprint and freight costs while maintaining superior stacking strength for efficient pallet loads.
Boxes - Corrugated

24x18x24 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 241824

24 x 18 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$48.00 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes engineered for demanding warehouse and fulfillment operations. 24"×18"×18" kraft construction with integrated hand holes enables ergonomic, two-person handling while maximizing load stability. Sold in bundles of 10 for volume savings and consistent performance.
Boxes - Corrugated

24x18x18 ECT-48 Double Wall Corrugated Shipping Boxes w/ Hand Holes 10-Pack

PN: HD241818DWHH

24 x 18 x 18 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$98.43 / BUNDLE
IN STOCK ECT-48 double wall corrugated construction rated for maximum stacking performance and freight durability. These 24x18x18 heavy-duty boxes protect high-value shipments and handle demanding warehouse environments. Ships flat in bundles of 10–maximize your storage and reduce freight costs.
Boxes - Corrugated

24x18x18 ECT-48 Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD241818DW

24 x 18 x 18 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$68.69 / BUNDLE
IN STOCK ECT-32 single-wall corrugated boxes in 24x18x14" dimensions deliver reliable strength for standard shipping and storage applications. This bundle of 15 kraft cartons offers excellent stacking performance and freight efficiency for warehouse operations. Recyclable construction reduces environmental impact while maintaining consistent protection.
Boxes - Corrugated

24x18x14 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 241814

24 x 18 x 14 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$57.60 / BUNDLE
IN STOCK ECT-48 double wall kraft corrugated boxes deliver maximum protection and stacking strength for high-volume fulfillment operations. These 24" × 18" × 12" heavy-duty cartons are engineered to handle demanding warehouse environments and reduce damage claims. Bundle of 10 ships flat, maximizing your storage efficiency and freight capacity.
Boxes - Corrugated

24x18x12 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD241812DW

24 x 18 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$58.34 / BUNDLE
IN STOCK Heavy-duty ECT-48 kraft double wall corrugated boxes built for demanding warehouse operations. These 24x18x6 shipping cartons deliver superior protection and stacking strength for palletized freight. Bundle of 15 ships flat to maximize storage efficiency and reduce freight costs.
Boxes - Corrugated

24x18x6 ECT-48 Kraft Heavy Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD24186DW

24 x 18 x 6 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$104.32 / BUNDLE
IN STOCK 18x18x24 Kraft Corrugated Moving Boxes with Flap Tabs, 240 Pack Pallet, 32 ECT
Boxes - Corrugated

18x18x24 ECT-32 Kraft Corrugated Moving Boxes with Flap Tabs 15-Pack

PN: 181824DPB

18 x 18 x 24 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$71.91 / BUNDLE
IN STOCK Ship tall items with confidence using these 16x16x26 corrugated boxes built from ECT-32 kraft material–strong enough to replace mailing tubes. End-loading design speeds packing and sealing. Sold flat in bundles of 10 for maximum freight efficiency.
Boxes - Corrugated

16x16x26 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 161626

16 x 16 x 26 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$36.60 / BUNDLE
IN STOCK Heavy-duty ECT-44 kraft corrugated side loading boxes engineered for vertical stacking and efficient freight logistics. 30"L x 6"W x 30"H dimensions optimize pallet configurations. Ships and stores flat–reduce warehouse footprint by 90% before assembly.
Boxes - Corrugated

30x6x30 ECT-44 Kraft Side Loading Box 10-Pack

PN: HD30630FOL

30 x 6 x 30 in ECT-44 Corrugated 10 PER BUNDLE
$104.43 / BUNDLE
IN STOCK 21x21x21 cube boxes manufactured from ECT-32 single-wall kraft corrugated–the ideal solution for shipping round, cylindrical, and irregularly shaped products. Sold in convenient bundles of 15 boxes, flat-packed for space-efficient storage and quick assembly. Reliable crush resistance and proven stacking performance for high-volume fulfillment operations.
Boxes - Corrugated

21x21x21 ECT-32 Kraft Corrugated Cube Shipping Boxes 15-Pack

PN: 212121

21 x 21 x 21 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$105.95 / BUNDLE
IN STOCK ECT-32 single wall corrugated boxes deliver reliable strength for medium-weight shipping at an economical price point. These 18" x 18" x 24" kraft cartons offer 4.5 cubic feet of capacity and ship flat to maximize your warehouse efficiency and reduce freight spend. Bundle of 15 units.
Boxes - Corrugated

18x18x24 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 181824

18 x 18 x 24 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$54.08 / BUNDLE

Product Help Request

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Buying path

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Larger orders

For pallet, recurring, or mixed-SKU orders, send your list and ZIP and get a delivered price by email.

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 finder -> Get a delivered quote for larger orders -> Compare corrugated box types -> View products below ->