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 Heavy-duty 12x12x15" corrugated shipping boxes manufactured from ECT-32 kraft material for reliable stacking and freight efficiency. Bundle of 25 boxes delivers standard industrial strength performance at volume savings. Recyclable cardboard construction reduces environmental impact.
Boxes - Corrugated

12x12x15 ECT-32 Kraft Corrugated Boxes 25-Pack

PN: 121215

12 x 12 x 15 in ECT-32 Corrugated 25 PER BUNDLE
$45.98 / BUNDLE
IN STOCK 9x9x18 Kraft Corrugated Shipping Boxes, 800 Pack Pallet, 32 ECT
Boxes - Corrugated

9x9x18 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 9918

9 x 9 x 18 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$34.57 / BUNDLE
IN STOCK 11.5x11.5x15.4 ECT-48 Double Wall Kraft Boxes - Shipping Cartons, Bundle of 25
Boxes - Corrugated

11 1/2x11 1/2x15.4 ECT-48 Kraft Shipping Boxes Heavy Duty 25-Pack

PN: KEG1

11 1/2 x 11 1/2 x 15 3/8 in ECT-48 Double Wall Corrugated 25 PER BUNDLE
$65.70 / BUNDLE
IN STOCK DOT-compliant hazmat shipping boxes designed for 1-gallon F-style paint cans. Each carton holds 4 cans with ECT-44 single-wall corrugated kraft construction. Pre-printed with mandatory warnings and directional arrows. Ships flat to maximize warehouse storage efficiency.
Boxes - Corrugated

16x11x12 ECT-44 Hazmat Shipping Boxes 10-Pack

PN: HAZ1049

16 x 11 x 12 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$147.20 / BUNDLE
IN STOCK Ship long, narrow items efficiently with our 24x4x4 corrugated boxes. ECT-32 kraft construction delivers reliable strength, while the long-side opening design speeds packing and reduces labor costs. Sold in bundles of 25–flat-shipped to maximize your warehouse space and freight efficiency.
Boxes - Corrugated

24x4x4 ECT-32 Kraft Corrugated Long Shipping Boxes

PN: 2444

24 x 4 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$26.52 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these ECT-32 kraft corrugated boxes sized 22" x 6" x 6". Wide lengthwise openings make packing wine bottles, umbrellas, carpet rolls, and tubing fast and effortless. Sold as a bundle of 25 flat-packed cartons for maximum freight efficiency and volume savings.
Boxes - Corrugated

22x6x6 ECT-32 Kraft Corrugated Long Shipping Boxes 25-Pack

PN: 2266

22 x 6 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$25.76 / BUNDLE
IN STOCK Ship long, narrow items efficiently with 20x8x8 ECT-32 kraft corrugated boxes featuring a convenient lengthwise opening for fast packing. Each bundle includes 25 flat-packed cartons, maximizing your warehouse storage and freight efficiency. Ideal for wine bottles, umbrellas, carpet rolls, and similar products.
Boxes - Corrugated

20x8x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 2088

20 x 8 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$30.16 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes sized 18" × 10" × 8" deliver dependable mid-range stacking strength for typical warehouse and fulfillment operations. Sold in bundles of 25, these brown cardboard boxes reduce per-unit costs while maintaining performance. Fully recyclable material supports sustainable packaging practices.
Boxes - Corrugated

18x10x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 18108

18 x 10 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$35.28 / BUNDLE
IN STOCK Dependable 18x10x6 corrugated shipping boxes built from ECT-32 kraft material for mid-weight product protection. Sold in bundles of 25 to maximize warehouse efficiency and reduce per-unit freight costs. Fully recyclable and stackable for optimal storage space.
Boxes - Corrugated

18x10x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 18106

18 x 10 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$30.95 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes sized 18" × 10" × 4" for optimal shallow product protection. This bundle of 25 flat corrugated cartons ships unassembled to maximize warehouse storage and reduce freight costs. Ideal for apparel, books, frames, and artwork.
Boxes - Corrugated

18x10x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 18104

18 x 10 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$28.83 / BUNDLE
IN STOCK Right-size every shipment with one versatile carton. These 16x12x12 multi-depth boxes fold to 12", 10", or 8" heights–no carton sizer needed. Strong ECT-32 kraft corrugated material cuts parcel costs and eliminates slow-moving SKUs from your warehouse.
Boxes - Corrugated

16x12x12 ECT-32 Multi-Depth Kraft Corrugated Shipping Boxes 25-Pack

PN: MD161212

16 x 12 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$49.89 / BUNDLE
IN STOCK Heavy-duty 16x12x12 corrugated shipping cartons built from ECT-32 kraft material for books, dense items, and freight-sensitive applications. Bundle of 25 ships flat to maximize storage efficiency and reduce logistics costs. Proven stacking performance for warehouse environments.
Boxes - Corrugated

16x12x12 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 25-Pack

PN: 161212

16 x 12 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$41.73 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes designed for mid-sized shipments and warehouse storage. 16" x 12" x 11" dimensions provide optimal stacking performance and freight efficiency. Bundle of 25 boxes ships flat to maximize storage space and reduce handling costs.
Boxes - Corrugated

16x12x11 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 161211

16 x 12 x 11 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$68.81 / BUNDLE
IN STOCK ECT-44 single wall kraft corrugated boxes deliver 40% greater strength than standard shipping cartons, making them ideal for high-stack warehouse environments. At 16" x 12" x 10", these heavy-duty boxes maximize pallet density while maintaining superior crush and puncture resistance. Sold in bundles of 25–built for B2B volume buyers.
Boxes - Corrugated

16x12x10 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD161210

16 x 12 x 10 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$105.96 / BUNDLE
IN STOCK Reduce carton SKUs and shipping costs with one versatile 16x12x10 multi-depth corrugated box. Score-folded at multiple heights–no sizer required. ECT-32 kraft construction delivers durability at volume. Sold as bundle of 25.
Boxes - Corrugated

16x12x10 ECT-32 Multi-Depth Kraft Corrugated Shipping Boxes 25-Pack

PN: MD161210

16 x 12 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$59.63 / BUNDLE
IN STOCK 16x12x10 Kraft Corrugated Shipping Boxes, 725 Pack Pallet, 32 ECT
Boxes - Corrugated

16x12x10 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 161210

16 x 12 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$39.28 / BUNDLE

Product Help Request

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Buying path

Buy Boxes & Mailers by the specs that change the order

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Compare

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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 ->