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 and store flat to maximize warehouse efficiency. These 13x11x2 ECT-32 kraft corrugated boxes are engineered for shallow items–perfect for fulfillment centers managing high-volume SKUs. Bundle of 25 reduces per-unit costs and keeps inventory lean.
Boxes - Corrugated

13x11x2 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 13112

13 x 11 x 2 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$42.03 / BUNDLE
IN STOCK Professional-grade 12x12x12" corrugated moving boxes with patented flap-tab design to streamline packing operations. ECT-32 kraft construction delivers reliable durability and stacking strength. Order by the bundle of 25 to maximize freight efficiency and reduce per-unit costs.
Boxes - Corrugated

12x12x12 ECT-32 Kraft Corrugated Moving Boxes 25-Pack

PN: 121212DPB

12 x 12 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$56.09 / BUNDLE
IN STOCK Industrial-grade 12x12x12 corrugated boxes rated ECT-44 single wall kraft construction–40% stronger than standard shipping cartons for maximum stacking performance and load protection. Ideal for warehouse fulfillment, e-commerce, and heavy item storage. Sold flat in bundles of 25 for space-efficient inventory management.
Boxes - Corrugated

12x12x12 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD1212

12 x 12 x 12 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$55.81 / BUNDLE
IN STOCK ECT-32 white corrugated boxes in the popular 12x12x12 cube size–sold as a 25-pack bundle. Strong single-wall construction handles the same stacking loads as kraft, with a crisp white exterior that showcases your labels and shipping instructions. Ideal for warehouse managers seeking volume savings without compromising durability.
Boxes - Corrugated

12x12x12 ECT-32 White Corrugated Shipping Boxes 25-Pack

PN: 121212W

12 x 12 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$44.29 / BUNDLE
IN STOCK Eliminate carton redundancy with pre-scored multi-depth 12x12x12 corrugated boxes that fold to your exact specifications. Strong ECT-32 kraft construction handles demanding warehouse and fulfillment operations while slashing inventory SKUs and parcel shipping expenses. Ships as a convenient 25-box bundle.
Boxes - Corrugated

12x12x12 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD121212

12 x 12 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$36.59 / BUNDLE
IN STOCK Space-efficient 12x12x12 cube boxes manufactured from sturdy ECT-32 kraft corrugated material. Each bundle contains 25 boxes with 1.0 cubic foot capacity, perfect for shipping cylindrical, round, and irregular items. Maximize your warehouse density and reduce per-unit shipping costs.
Boxes - Corrugated

12x12x12 ECT-32 Kraft Corrugated Cube Shipping Boxes 25-Pack

PN: 121212

12 x 12 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$31.21 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes in 12" x 12" x 11" dimensions deliver reliable strength for mid-weight product shipping and warehouse storage. Each bundle contains 25 boxes, offering volume savings and consistent performance for fulfillment operations. Recyclable kraft construction reduces environmental impact while maintaining structural integrity.
Boxes - Corrugated

12x12x11 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 121211

12 x 12 x 11 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$38.68 / BUNDLE
IN STOCK ECT-48 heavy-duty double wall corrugated boxes engineered for maximum stacking strength and freight protection. These 12" x 12" x 10" kraft cartons ship flat to minimize warehouse footprint and reduce logistics costs. Bundle of 15 boxes per pack.
Boxes - Corrugated

12x12x10 ECT-48 Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD121210DW

12 x 12 x 10 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$37.37 / BUNDLE
IN STOCK Eliminate carton sizers and inventory bloat with these 12x12x10 multi-depth kraft corrugated boxes. Scored sidewalls fold to five different heights, so one SKU replaces multiple boxes. Built tough with ECT-32 single-wall construction for reliable stacking and freight performance.
Boxes - Corrugated

12x12x10 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD121210

12 x 12 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$45.83 / BUNDLE
IN STOCK ECT-32 single-wall corrugated boxes sized 12"12"10" deliver proven durability for mid-weight shipments and warehouse storage. Kraft construction provides excellent stacking performance and freight efficiency in 25-box bundles. Recyclable and cost-effective for high-volume fulfillment operations.
Boxes - Corrugated

12x12x10 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 121210

12 x 12 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$32.96 / BUNDLE
IN STOCK Industrial-grade 12" x 12" x 8" double wall corrugated boxes built from ECT-48 kraft material for maximum stacking performance and freight protection. Bundle of 15 cartons ships flat, reducing storage footprint and freight costs. Perfect for warehouse managers handling mid-weight to heavy shipments.
Boxes - Corrugated

12x12x8 ECT-48 Heavy Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD12128DW

12 x 12 x 8 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$34.80 / BUNDLE
IN STOCK Industrial-grade 12x12x8 heavy-duty corrugated boxes engineered for demanding warehouse operations. Built with ECT-44 single-wall kraft construction–40% stronger than standard shipping containers–for superior stacking performance and product protection. Sold flat in convenient bundles of 25 to maximize storage and freight efficiency.
Boxes - Corrugated

12x12x8 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD12128

12 x 12 x 8 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$70.63 / BUNDLE
IN STOCK Reduce carton SKUs and shipping costs with our 12x12x8 multi-depth corrugated boxes. Score lines allow easy height adjustment from 4" to 8" without a carton sizer–one box type replaces three. Strong ECT-32 kraft construction handles warehouse stacking and parcel service demands. Sold as a bundle of 25.
Boxes - Corrugated

12x12x8 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD12128

12 x 12 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$44.43 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes in 12x12x7 dimensions–engineered for reliable mid-weight product protection. Sold as a bundle of 25 units. Maximize your warehouse efficiency with recyclable, stackable cardboard shipping containers built for performance.
Boxes - Corrugated

12x12x7 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 12127

12 x 12 x 7 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$30.85 / BUNDLE
IN STOCK ECT-48 double wall kraft corrugated boxes deliver maximum protection for mid-size shipments. 12" x 12" x 6" dimensions suit small-to-medium products with superior stacking performance. Bundle of 15 ships flat–save storage space and reduce freight costs.
Boxes - Corrugated

12x12x6 ECT-48 Kraft Double Wall Corrugated Boxes 15-Pack

PN: HD12126DW

12 x 12 x 6 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$31.02 / BUNDLE
IN STOCK Heavy-duty ECT-44 kraft corrugated boxes built 40% stronger than standard single wall cartons for superior stacking performance and freight protection. 12" x 12" x 6" dimensions ship flat in bundles of 25, maximizing your warehouse space and reducing packaging spend per unit. Ideal for fulfillment centers and warehouse managers handling mid-weight products.
Boxes - Corrugated

12x12x6 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD12126

12 x 12 x 6 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$39.89 / 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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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 ->