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 Premium ECT-48 double wall corrugated shipping cartons built for high-performance logistics. 12x12x48" kraft boxes deliver maximum stacking strength and crush resistance for demanding fulfillment operations. Ships flat in bundles of 10–optimize your warehouse footprint and freight costs without sacrificing protection.
Boxes - Corrugated

12x12x48 ECT-48 Kraft Double Wall Corrugated Boxes 10-Pack

PN: HD121248DW

12 x 12 x 48 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$111.79 / BUNDLE
IN STOCK ECT-44 single-wall kraft corrugated boxes engineered for side loading operations and maximum freight efficiency. 54x8x28" dimensions ship flat to reduce storage footprint and transportation costs. Bundle of 5 cartons ready to deploy in your fulfillment workflow.
Boxes - Corrugated

54x8x28 ECT-44 Kraft Side Loading Boxes 5-Pack

PN: HD54828FOL

54 x 8 x 28 in ECT-44 Single Wall Corrugated 5 PER BUNDLE
$124.40 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 50" x 12" x 12" kraft corrugated boxes featuring ECT-32 single-wall construction. Wide lengthwise openings reduce packing time and labor costs. Sold in bundles of 10–maximize freight efficiency with our space-saving long box design.
Boxes - Corrugated

50x12x12 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 501212

50 x 12 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$75.90 / BUNDLE
IN STOCK Ship tall items efficiently with our 14x14x48" ECT-32 kraft corrugated boxes. End-loading design simplifies packing and sealing. Sold as a bundle of 10 and shipped flat for maximum freight efficiency–the cost-effective alternative to mailing tubes.
Boxes - Corrugated

14x14x48 ECT-32 Kraft Corrugated Tall Shipping Boxes 10-Pack

PN: 141448

14 x 14 x 48 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$80.96 / BUNDLE
IN STOCK 10x6x57" ECT-32 Telescoping Inner Boxes - Adjustable Tall Cartons, Bundle of 15
Boxes - Corrugated

10x6x57 ECT-32 Telescoping Inner Boxes 15-Pack

PN: T10657INNER

10 x 6 x 57 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$109.38 / BUNDLE
IN STOCK Tall corrugated boxes measuring 15" x 15" x 48" with ECT-32 kraft construction deliver 6.3 cubic feet of capacity per carton. End-loading design enables fast insertion and sealing for high-volume fulfillment operations. Sold flat in convenient bundles of 10 for maximum freight efficiency and storage.
Boxes - Corrugated

15x15x48 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 151548

15 x 15 x 48 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$63.73 / BUNDLE
IN STOCK 10.5x6.5x57" Telescoping Outer Boxes ECT-32 Kraft - Adjustable Tall Cartons, 15-Pack
Boxes - Corrugated

10.5x6.5x57 ECT-32 Kraft Telescoping Outer Boxes 15-Pack

PN: T10657OUTER

10 1/2 x 6.5 x 57 in ECT-32 Corrugated 15 PER BUNDLE
$117.35 / BUNDLE
IN STOCK Heavy-duty ECT-32 single wall corrugated shipping boxes in standard 32"x32"x12" dimensions. Collapse flat for 80% storage savings and maximum freight efficiency. Sold in bundles of 10–ideal for high-volume warehouse and fulfillment operations.
Boxes - Corrugated

32x32x12 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 323212

32 x 32 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$114.81 / BUNDLE
IN STOCK Ship smarter with these 32x32x8" ECT-32 kraft corrugated boxes–engineered for shallow products without wasted space. Each bundle of 10 arrives flat, cutting your warehouse footprint and freight expenses. Ideal for apparel, books, frames, and artwork.
Boxes - Corrugated

32x32x8 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 32328

32 x 32 x 8 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$140.69 / BUNDLE
IN STOCK Professional-grade ECT-48 double wall corrugated boxes sized 48" x 16" x 16" for maximum protection and stacking performance. Heavy-duty kraft construction rated for demanding warehouse and fulfillment operations. Sold in bundles of 10 and ship flat to minimize storage footprint and reduce freight costs.
Boxes - Corrugated

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

PN: HD481616DW

48 x 16 x 16 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$133.99 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 48x16x16 ECT-32 kraft corrugated boxes featuring wide long-side openings for fast packing. Sold in bundles of 10 and shipped flat to maximize your warehouse space and minimize freight expenses. Ideal for wine bottles, umbrellas, carpet rolls, and similar products requiring extended length protection.
Boxes - Corrugated

48x16x16 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 481616

48 x 16 x 16 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$86.84 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 16x16x48 inches for tall item shipping. Single-wall construction delivers strength at competitive cost. Sold in bundles of 10, shipped flat for maximum freight efficiency.
Boxes - Corrugated

16x16x48 ECT-32 Kraft Corrugated Boxes 10-Pack

PN: 161648

16 x 16 x 48 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$77.67 / BUNDLE
IN STOCK ECT-32 single-wall corrugated boxes measuring 12x12x52 inches–ideal for tall, narrow items, pharmaceuticals, and vertical storage applications. Ships and stores flat to maximize warehouse efficiency and reduce freight charges. Bundle of 15 boxes delivers trusted kraft construction and reliable stacking performance for high-volume fulfillment operations.
Boxes - Corrugated

12x12x52 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 121252

12 x 12 x 52 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$113.86 / BUNDLE
IN STOCK Ship tall items efficiently with 4x4x60 ECT-32 kraft corrugated boxes. End-load design speeds packing; strong single-wall construction handles stacking. Sold in bundles of 25 flat for maximum freight efficiency.
Boxes - Corrugated

4x4x60 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4460

4 x 4 x 60 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$75.26 / BUNDLE
IN STOCK Ship tall, narrow items efficiently with our 28x6x52" side loading corrugated boxes. ECT-32 kraft construction provides reliable stacking strength and damage protection. Bundle of 5 ships flat to maximize warehouse storage–reducing your packaging footprint and freight expenses.
Boxes - Corrugated

28x6x52 ECT-32 Kraft Side Loading Boxes 5-Pack

PN: 28652FOL

28 x 6 x 52 in ECT-32 Single Wall Corrugated 5 PER BUNDLE
$61.46 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes engineered for tall, fragile items–trophies, fishing rods, shelving, and tubing. End-loading design speeds packing; 5x5x60 dimensions maximize cubic capacity without wasted material. Bundle of 20 ships flat to save freight costs.
Boxes - Corrugated

5x5x60 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 5560

5 x 5 x 60 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$95.32 / 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

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Confirm

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Reorder

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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 ->