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 tall items efficiently with our 6x6x36 corrugated boxes in ECT-32 kraft single wall construction. These end-loading tall cardboard boxes are ideal for fishing rods, trophies, and shelving units. Sold flat in convenient bundles of 25 to maximize warehouse storage and reduce freight costs.
Boxes - Corrugated

6x6x36 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 6636

6 x 6 x 36 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$50.59 / BUNDLE
IN STOCK Ship tall items with confidence using our ECT-32 kraft corrugated boxes in 4x4x38 dimensions. Strong single-wall construction handles trophies, fishing rods, shelving, and more. Sold as a bundle of 25 flat-packed boxes–maximum freight efficiency with minimal storage footprint.
Boxes - Corrugated

4x4x38 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4438

4 x 4 x 38 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$68.29 / BUNDLE
IN STOCK Protect high-value shipments with ECT-48 double wall kraft corrugated boxes designed for superior stacking performance and freight stability. These 18x18x24 heavy-duty cartons deliver maximum cushioning and compression resistance. Bundle of 10 ships flat to maximize your warehouse space and reduce logistics costs.
Boxes - Corrugated

18x18x24 ECT-48 Kraft Double Wall Corrugated Boxes 10-Pack

PN: HD181824DW

18 x 18 x 24 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$66.92 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes sized 26" × 17" × 5" for optimal shallow-product performance. Sold as bundles of 25 and ship flat to reduce warehouse footprint and freight costs. Perfect for apparel, books, frames, and artwork with reliable stacking strength.
Boxes - Corrugated

26x17x5 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 26175

26 x 17 x 5 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$120.42 / BUNDLE
IN STOCK Professional-grade 24x18x24 double wall corrugated boxes built with ECT-48 kraft material for maximum protection and stacking performance. These heavy-duty shipping cartons handle demanding logistics while flat-shipping design cuts your storage footprint. Sold in bundles of 10 for volume efficiency.
Boxes - Corrugated

24x18x24 ECT-48 Kraft Double Wall Corrugated Boxes 10-Pack

PN: HD241824DW

24 x 18 x 24 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$77.29 / BUNDLE
IN STOCK Protect high-value shipments with ECT-48 double wall construction and proven stacking performance. These 6x6x36 kraft corrugated boxes deliver superior burst strength and compression resistance for warehouses handling demanding freight. Bundle of 15 ships flat–maximize your storage efficiency and reduce handling costs.
Boxes - Corrugated

6x6x36 ECT-48 Kraft Double Wall Corrugated Boxes 15-Pack

PN: HD6636DW

6 x 6 x 36 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$85.56 / BUNDLE
IN STOCK Industry-standard 30x13x13 corrugated boxes with ECT-32 single wall construction deliver reliable strength for mid-size shipments. Bundle of 20 ships and stores completely flat, cutting your warehouse footprint by up to 80%. Perfect for e-commerce fulfillment, retail distribution, and storage applications.
Boxes - Corrugated

30x13x13 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 301313

30 x 13 x 13 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$100.33 / BUNDLE
IN STOCK Heavy-duty ECT-32 kraft corrugated boxes sized 24" x 20" x 20" for reliable mid-weight shipping and storage. Sold in bundles of 10, these sturdy cardboard cartons deliver proven stacking performance and freight efficiency for warehouse operations. Fully recyclable and built to protect your products in transit.
Boxes - Corrugated

24x20x20 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 242020

24 x 20 x 20 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$47.09 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 36x8x8 corrugated boxes featuring wide side openings for fast packing. ECT-32 kraft construction provides reliable protection while minimizing dimensional weight charges. Sold flat in bundles of 25 for space-saving storage and fast deployment.
Boxes - Corrugated

36x8x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 3688

36 x 8 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$54.69 / BUNDLE
IN STOCK Ship long, narrow items efficiently with our 36x8x4 ECT-32 kraft corrugated boxes. Long-side opening design speeds packing for wine bottles, umbrellas, carpet rolls, and similar products. Sold in convenient 25-box bundles–maximize your freight efficiency and reduce per-unit packaging costs.
Boxes - Corrugated

36x8x4 ECT-32 Kraft Corrugated Long Shipping Boxes 25-Pack

PN: 3684

36 x 8 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$68.11 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 34x10x6 corrugated boxes featuring convenient long-side openings for fast packing. Made from ECT-32 kraft corrugated material with proven stacking strength. Sold flat in bundles of 10 to maximize your storage and freight efficiency.
Boxes - Corrugated

34x10x6 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 34106

34 x 10 x 6 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$21.43 / BUNDLE
IN STOCK 32x12x12 Kraft Corrugated Shipping Boxes, 380 Pack Pallet, 32 ECT
Boxes - Corrugated

32x12x12 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 321212

32 x 12 x 12 in ECT-32 Corrugated 20 PER BUNDLE
$58.32 / BUNDLE
IN STOCK Ship long, narrow items efficiently with our 32x12x10 ECT-32 kraft corrugated boxes. Engineered long side opening for fast, easy packing of wine bottles, umbrellas, carpet rolls, and similar products. Sold as a bundle of 20 boxes, flat-shipped to maximize your freight efficiency.
Boxes - Corrugated

32x12x10 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 321210

32 x 12 x 10 in ECT-32 Corrugated 20 PER BUNDLE
$55.16 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 30" x 14" x 10" deliver reliable stacking strength for mid-weight shipments and warehouse storage. This 10-box bundle offers cost-effective packaging for fulfillment centers managing volume orders. Recyclable cardboard construction meets sustainability standards while maintaining structural integrity throughout the supply chain.
Boxes - Corrugated

30x14x10 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 301410

30 x 14 x 10 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$29.70 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 30" × 14" × 7" deliver reliable containment for mid-weight industrial shipments. This bundle of 10 standard strength cartons maximizes your freight efficiency and reduces per-unit costs. Fully recyclable kraft construction optimizes your sustainability goals.
Boxes - Corrugated

30x14x7 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 30147

30 x 14 x 7 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$25.75 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 28" x 16" x 14" deliver proven strength for mid-weight industrial shipping. This bundle of 15 units maximizes your storage efficiency and reduces per-unit freight costs. Recyclable kraft construction meets sustainability standards while maintaining reliable stacking performance.
Boxes - Corrugated

28x16x14 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 15-Pack

PN: 281614

28 x 16 x 14 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$60.06 / 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 ->