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 Standard-strength ECT-32 kraft corrugated shipping boxes in 25x25x20" dimensions. Ideal for mid-weight product fulfillment with reliable stacking performance. Sold as a bundle of 10 boxes for volume savings and freight efficiency.
Boxes - Corrugated

25x25x20 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 252520

25 x 25 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$65.28 / BUNDLE
IN STOCK Heavy-duty 25x25x12 corrugated shipping boxes with ECT-32 kraft construction deliver trusted strength for mid-size industrial shipments. This 15-box bundle maximizes your freight efficiency while maintaining superior stacking performance. Fully recyclable and built to protect your products in transit.
Boxes - Corrugated

25x25x12 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 252512

25 x 25 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$104.19 / BUNDLE
IN STOCK Industrial-grade 24x24x24 triple wall corrugated boxes engineered for heavy loads and long-distance shipments. ECT-90 kraft construction delivers over ½" thickness and plywood-equivalent protection without premium pricing. Sold in bundles of 5 to maximize freight efficiency and reduce per-unit costs.
Boxes - Corrugated

24x24x24 ECT-90 Triple Wall Corrugated Boxes 5-Pack

PN: HD242424TW

24 x 24 x 24 in ECT-90 Triple Wall Corrugated 5 PER BUNDLE
$159.86 / BUNDLE
IN STOCK ECT-44 single wall kraft corrugated boxes sized 44" × 6" × 35" for demanding fulfillment operations. Side loading design with flat-ship capability reduces storage footprint and freight costs per unit. Sold as bundle of 10–the standard for high-volume warehouses.
Boxes - Corrugated

44x6x35 ECT-44 Kraft Side Loading Boxes 10-Pack

PN: HD44635FOL

44 x 6 x 35 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$147.75 / BUNDLE
IN STOCK Ship long, narrow items efficiently with 36x14x14 ECT-32 kraft corrugated boxes featuring extended side openings for rapid packing. Bundle of 15 units arrives flat, maximizing freight savings and warehouse space. Ideal for wine bottles, umbrellas, carpet rolls, and similar elongated products.
Boxes - Corrugated

36x14x14 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 361414

36 x 14 x 14 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$88.09 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 30" × 20" × 20" deliver reliable strength for mid-weight industrial shipping and storage. Sold in bundles of 10, these standard-duty cardboard boxes stack efficiently in your warehouse while reducing per-unit costs. Fully recyclable and built for demanding fulfillment operations.
Boxes - Corrugated

30x20x20 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 302020

30 x 20 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$56.52 / BUNDLE
IN STOCK Proven ECT-32 single-wall corrugated construction delivers reliable stacking strength and burst resistance for high-volume fulfillment operations. This 30x20x18 kraft box bundle of 15 ships flat to maximize warehouse storage and minimize freight spend. The industry-standard choice for warehouse managers prioritizing durability and efficiency.
Boxes - Corrugated

30x20x18 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 302018

30 x 20 x 18 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$125.10 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes sized 30×20×12" deliver reliable protection for mid-weight shipments with proven stacking strength. This 15-box bundle maximizes freight efficiency and reduces per-unit costs for high-volume warehouse operations. Fully recyclable kraft construction meets sustainability goals without compromising performance.
Boxes - Corrugated

30x20x12 ECT-32 Kraft Corrugated Boxes Durable Shipping 15-Pack

PN: 302012

30 x 20 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$70.67 / BUNDLE
IN STOCK 30x20x8 Kraft Corrugated Shipping Boxes, 210 Pack Pallet, 32 ECT
Boxes - Corrugated

30x20x8 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 30208

30 x 20 x 8 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$84.61 / BUNDLE
IN STOCK Ship round and odd-shaped products with confidence using our 25x25x25" cube boxes manufactured from ECT-32 kraft corrugated. This versatile, stackable carton ships flat and assembles quickly–perfect for fulfillment centers moving high volumes. Sold in bundles of 10 with volume pricing available.
Boxes - Corrugated

25x25x25 ECT-32 Kraft Corrugated Cube Shipping Boxes 10-Pack

PN: 252525

25 x 25 x 25 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$77.31 / BUNDLE
IN STOCK Ship tall items efficiently with these 14x14x36 corrugated boxes made from ECT-32 kraft material. End-loading design speeds packing and sealing. Sold as a bundle of 15 boxes, flat-shipped to maximize freight efficiency and reduce your per-unit packaging cost.
Boxes - Corrugated

14x14x36 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 141436

14 x 14 x 36 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$62.10 / BUNDLE
IN STOCK ECT-32 single wall corrugated side loading boxes designed for vertical packing efficiency and maximum stackability. 14" x 4" x 42" full overlap FOL construction ships flat to minimize warehouse storage footprint. Bundle of 15 cartons–the standard choice for high-volume fulfillment operations.
Boxes - Corrugated

14x4x42 ECT-32 Full Overlap FOL Side Loading Boxes 15-Pack

PN: 14442FOL

14 x 4 x 42 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$90.08 / BUNDLE
IN STOCK 10x10x40 ECT-32 Kraft Corrugated Boxes - Tall Shipping, Bundle of 25
Boxes - Corrugated

10x10x40 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 101040

10 x 10 x 40 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$72.64 / BUNDLE
IN STOCK Ship tall items with confidence using our 8x8x42 corrugated boxes in ECT-32 kraft single-wall construction. End-loading design speeds packing and sealing. Sold as bundle of 20–ideal for warehouses and fulfillment centers shipping trophies, shelving, rods, and poles.
Boxes - Corrugated

8x8x42 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 8842

8 x 8 x 42 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$81.50 / BUNDLE
IN STOCK Space-efficient 4x4x46 tall corrugated boxes made from ECT-32 kraft single wall material. End-load design enables fast, efficient packing and sealing operations. Ships flat in bundles of 25–perfect for warehouses requiring vertical storage solutions without the weight penalty of mailing tubes.
Boxes - Corrugated

4x4x46 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4446

4 x 4 x 46 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$81.21 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 20x20x30" dimensions deliver proven stacking performance and freight efficiency for warehouse and fulfillment operations. Each bundle contains 10 boxes manufactured from durable single-wall corrugated material. Recyclable kraft construction reduces waste while maintaining cost-effective strength standards.
Boxes - Corrugated

20x20x30 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 202030

20 x 20 x 30 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$58.19 / 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 ->