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 Ship round and irregularly shaped products with confidence using these ECT-32 kraft corrugated cube boxes. Each 22x22x22" box offers 6.0 cubic feet of capacity and rated for reliable stacking performance. Order by the bundle of 10 and maximize your warehouse efficiency.
Boxes - Corrugated

22x22x22 ECT-32 Kraft Corrugated Cube Shipping Boxes 10-Pack

PN: 222222

22 x 22 x 22 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$46.29 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping cartons sized 22" × 22" × 8" for optimal fits on shallow product shipments. These cardboard boxes ship flat in bundles of 15, maximizing your warehouse storage efficiency and reducing inbound freight costs. Ideal for apparel, books, artwork, mirrors, and picture frames.
Boxes - Corrugated

22x22x8 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 22228

22 x 22 x 8 in ECT-32 Corrugated 15 PER BUNDLE
$54.14 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 20x20x24" deliver reliable strength for mid-weight industrial shipping and storage. This bundle of 10 standard-duty cardboard boxes provides excellent stacking performance and freight efficiency for warehouse operations. Recyclable kraft construction reduces environmental impact while maintaining cost-effectiveness.
Boxes - Corrugated

20x20x24 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 202024

20 x 20 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$48.05 / BUNDLE
IN STOCK Ship tall items safely with our 4x4x40 ECT-32 kraft corrugated boxes–ideal for trophies, shelving, rods, and vertical freight. Heavy-duty single-wall construction rated for stacking. Sold flat in bundles of 25 for maximum storage efficiency and cost savings.
Boxes - Corrugated

4x4x40 ECT-32 Kraft Corrugated Boxes 25-Pack

PN: 4440

4 x 4 x 40 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$49.59 / BUNDLE
IN STOCK ECT-48 double wall corrugated cartons engineered for maximum protection and stacking performance in high-volume fulfillment operations. Each bundle of 10 kraft boxes ships flat, reducing storage footprint and freight costs. Superior burst strength handles demanding warehouse environments.
Boxes - Corrugated

24x20x20 ECT-48 Double Wall Corrugated Boxes 10-Pack

PN: HD242020DW

24 x 20 x 20 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$78.61 / BUNDLE
IN STOCK Open 24 x 13 x 31-inch kraft multi-depth corrugated shipping box, SKU MD241331.
Boxes - Corrugated

24x13x31 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 10-Pack

PN: MD241331

24 x 13 x 31 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$64.62 / BUNDLE
IN STOCK Heavy-duty 22x22x16 double wall corrugated boxes with ECT-48 rating deliver superior stacking performance and freight efficiency for high-volume warehouses. Each bundle contains 10 kraft boxes that ship flat, reducing storage footprint by up to 90%. Perfect for e-commerce fulfillment, manufacturing, and 3PL operations requiring reliable, stackable cardboard shipping containers.
Boxes - Corrugated

22x22x16 ECT-48 Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD222216DW

22 x 22 x 16 in D.W./ECT-48 Corrugated 10 PER BUNDLE
$105.69 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes engineered for maximum protection and stacking performance. These 22x22x12 kraft cartons deliver superior crush resistance and freight efficiency–ship flat in bundles of 10 to reduce storage and logistics costs.
Boxes - Corrugated

22x22x12 ECT-48 Kraft Heavy-Duty Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD222212DW

22 x 22 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$102.90 / BUNDLE
IN STOCK Ship tall items efficiently with these 14x14x30 ECT-32 kraft corrugated boxes. End-loading design enables fast packing and sealing. Sold as a bundle of 20 boxes, flat-packed for minimal freight costs and warehouse space.
Boxes - Corrugated

14x14x30 ECT-32 Kraft Corrugated Tall Shipping Boxes 20-Pack

PN: 141430

14 x 14 x 30 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$87.24 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes designed for tall, rigid items like shelving, fishing rods, and trophies. End-loading design ensures easy insertion and secure sealing. Bundle of 25 ships flat for maximum freight efficiency and volume savings.
Boxes - Corrugated

8x8x36 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 8836

8 x 8 x 36 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$61.40 / BUNDLE
IN STOCK Heavy-duty 6x6x38 tall corrugated boxes built with ECT-32 kraft material for secure shipping of long items like fishing rods, trophies, and shelving units. End-loading design enables fast, efficient packing. Sold flat in bundles of 25 for maximum freight efficiency and cost savings.
Boxes - Corrugated

6x6x38 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 6638

6 x 6 x 38 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$68.98 / BUNDLE
IN STOCK Industrial-grade ECT-48 double wall corrugated boxes engineered for maximum protection and stacking performance. These 22x22x22" kraft cartons provide the strength your high-volume shipments demand, while flat-shipped bundles of 10 reduce your storage footprint and freight costs.
Boxes - Corrugated

22x22x22 ECT-48 Heavy Duty Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD222222DW

22 x 22 x 22 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$99.40 / BUNDLE
IN STOCK Professional-grade 20x20x24 double wall kraft corrugated boxes with ECT-48 strength rating–built to handle heavy loads in warehouses and fulfillment centers. Ship and store flat to reduce freight costs and storage footprint. Bundle of 10 boxes per pack.
Boxes - Corrugated

20x20x24 ECT-48 Kraft Double Wall Corrugated Boxes 10-Pack

PN: HD202024DW

20 x 20 x 24 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$130.80 / BUNDLE
IN STOCK 30x15x15 Kraft Corrugated Heavy Duty Shipping Boxes, 285 Pack Pallet, 32 ECT
Boxes - Corrugated

30x15x15 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 15-Pack

PN: 301515

30 x 15 x 15 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$58.30 / BUNDLE
IN STOCK ECT-32 kraft corrugated cartons sized 28" × 17" × 5" engineered for shallow products like apparel, books, and artwork. Sold in bundles of 15 and ship flat to maximize your warehouse efficiency and reduce storage footprint. Single-wall construction delivers reliable protection at cost-effective pricing.
Boxes - Corrugated

28x17x5 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 28175

28 x 17 x 5 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$41.88 / BUNDLE
IN STOCK Reliable ECT-32 single-wall corrugated boxes sized 20" x 20" x 25" for mid-range freight and storage applications. Kraft construction delivers predictable stacking performance and cost efficiency. Sold in bundles of 10–ideal for fulfillment centers managing variable volume demands.
Boxes - Corrugated

20x20x25 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 202025

20 x 20 x 25 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$49.50 / BUNDLE

Product Help Request

Send the SKU, quantity, delivery ZIP, and any required specs so we can route the request.

Buying path

Buy Boxes & Mailers 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 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 ->