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 long, irregular items efficiently with our 15x15x30" tall corrugated boxes. ECT-32 single-wall kraft construction delivers reliable strength and 3.9 cubic feet of capacity per box. Bundle of 15 boxes–ideal for golf clubs, fishing rods, shelving, and tubes.
Boxes - Corrugated

15x15x30 ECT-32 Tall Corrugated Shipping Boxes 15-Pack

PN: 151530

15 x 15 x 30 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$54.58 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 5" × 5" × 40" for shipping tall, narrow items like fishing rods, shelving, and trophies. End-loading design speeds packing and sealing. Sold flat in bundles of 25 for maximum freight efficiency.
Boxes - Corrugated

5x5x40 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 5540

5 x 5 x 40 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$75.30 / BUNDLE
IN STOCK Industrial-grade 30x15x15 double wall corrugated shipping boxes with ECT-48 strength rating–built for high-volume fulfillment and demanding stacking environments. Ships flat to maximize warehouse efficiency and reduce freight costs. Bundle of 10 kraft cardboard boxes ready to assemble.
Boxes - Corrugated

30x15x15 ECT-48 Double Wall Corrugated Boxes 10-Pack

PN: HD301515DW

30 x 15 x 15 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$103.81 / BUNDLE
IN STOCK Tall 9x9x36" corrugated boxes made from sturdy ECT-32 kraft material, designed for end-loading efficiency and maximum protection. Perfect for shipping trophies, shelving, fishing rods, and other long items. Ships flat in bundles of 25 to maximize freight efficiency and reduce storage footprint.
Boxes - Corrugated

9x9x36 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 9936

9 x 9 x 36 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$84.97 / BUNDLE
IN STOCK Ship shallow products with confidence using these 29x17x3" ECT-32 kraft corrugated boxes. Each bundle of 25 arrives flat, maximizing your storage space and reducing freight costs. Engineered for apparel, books, artwork, and picture frames with reliable stacking performance.
Boxes - Corrugated

29x17x3 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 29173

29 x 17 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$112.99 / BUNDLE
IN STOCK ECT-32 kraft corrugated long boxes designed for narrow, elongated items like wine bottles, umbrellas, and carpet rolls. Wide openings along the 40" length simplify packing and reduce labor time. Shipped flat in bundles of 25 for maximum freight efficiency and storage savings.
Boxes - Corrugated

40x6x6 ECT-32 Kraft Corrugated Long Shipping Boxes 25-Pack

PN: 4066

40 x 6 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$91.66 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 36x10x10 ECT-32 kraft corrugated boxes featuring wide length openings for fast packing. Engineered for wine bottles, umbrellas, carpet rolls, and similar products. Sold flat in bundles of 20 to maximize freight efficiency and storage.
Boxes - Corrugated

36x10x10 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 361010

36 x 10 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$53.39 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes designed specifically for long, narrow items like wine bottles, umbrellas, and carpet rolls. The 36x10x6" dimensions with long-side openings enable fast, efficient packing without crushing or damage. Sold flat in bundles of 25 for maximum freight efficiency and cost savings.
Boxes - Corrugated

36x10x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 36106

36 x 10 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$93.76 / BUNDLE
IN STOCK 30x17x17 Double Wall Corrugated Boxes, 140 Pack Pallet, 51 ECT
Boxes - Corrugated

30x17x17 ECT-51 Double Wall Corrugated Boxes 5-Pack

PN: AF301717

30 x 17 x 17 in ECT-51 Double Wall Corrugated 5 PER BUNDLE
$40.06 / BUNDLE
IN STOCK Ship and store apparel efficiently with these ECT-32 kraft corrugated boxes sized 29" x 17" x 12". Sold in bundles of 15 units for maximum volume savings. Handles hanger or flat-pack clothing with reliable stacking strength.
Boxes - Corrugated

29x17x12 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 291712

29 x 17 x 12 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$60.35 / BUNDLE
IN STOCK Sturdy ECT-32 single wall kraft corrugated boxes in 29" x 17" x 9" dimensions, sold in bundles of 15 for maximum freight efficiency. Designed for the garment industry–pack clothing with or without hangers. Reliable stacking performance and proven durability for high-volume warehouse operations.
Boxes - Corrugated

29x17x9 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 29179

29 x 17 x 9 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$51.01 / BUNDLE
IN STOCK Ship apparel efficiently with these ECT-32 kraft corrugated boxes sized 29" × 17" × 5". Bundle of 15 units delivers reliable strength and cost savings. Compatible with hanging or folded garments–the versatile solution for clothing warehouses and fulfillment centers.
Boxes - Corrugated

29x17x5 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 29175

29 x 17 x 5 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$44.91 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes sized 28" x 18" x 18" deliver proven stacking strength for high-volume warehouse and fulfillment operations. Sold in bundles of 10, these heavy-duty cardboard shipping boxes maximize pallet efficiency while reducing freight costs. Fully recyclable and engineered for demanding logistics environments.
Boxes - Corrugated

28x18x18 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 281818

28 x 18 x 18 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$41.45 / BUNDLE
IN STOCK Ship smarter with these 28x18x8" ECT-32 kraft corrugated boxes–engineered for shallow products like apparel, books, and artwork. Bundle of 15 ships flat, cutting storage footprint and freight costs. ECT-32 single-wall construction delivers reliable protection with proven stacking performance.
Boxes - Corrugated

28x18x8 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 28188

28 x 18 x 8 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$68.33 / BUNDLE
IN STOCK Heavy-duty ECT-44 corrugated cartons with pre-scored multi-depth design–cut to size and eliminate wasted space that triggers dimensional weight surcharges. 40% stronger than standard shipping containers. Sold as bundle of 10.
Boxes - Corrugated

26x20x20 ECT-44 Heavy-Duty Multi-Depth Corrugated Shipping Boxes 10-Pack

PN: MDHD262020

26 x 20 x 20 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$71.94 / BUNDLE
IN STOCK Heavy-duty ECT-32 kraft corrugated shipping cartons in 26" x 20" x 20" dimensions, sold in bundles of 10. Superior stacking strength and compression resistance for reliable freight protection. Reduce per-unit packaging costs while maintaining professional shipping standards.
Boxes - Corrugated

26x20x20 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 262020

26 x 20 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$50.47 / 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 ->