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 Durable 7x5x4 corrugated shipping boxes built from ECT-32 kraft material for reliable protection at standard strength ratings. Sold as a bundle of 25 units, these kraft cartons offer proven stacking performance and freight efficiency for high-volume warehouse operations. Fully recyclable and ready to ship.
Boxes - Corrugated

7x5x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 754

7 x 5 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$11.00 / BUNDLE
IN STOCK Industrial-grade 7 x 5 x 3 inch corrugated boxes built from ECT-32 kraft material for dependable shipping and storage performance. This 25-box bundle delivers the strength and crush resistance your warehouse needs at volume pricing. Recyclable and stackable for efficient fulfillment operations.
Boxes - Corrugated

7x5x3 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 753

7 x 5 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$14.51 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 6" 6" 5" deliver dependable strength for small-to-medium item shipments. Sold in bundles of 25, these brown cardboard boxes are ideal for e-commerce fulfillment, warehouse storage, and lightweight product protection. Recyclable kraft material reduces environmental footprint while maximizing freight efficiency.
Boxes - Corrugated

6x6x5 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 665

6 x 6 x 5 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$12.18 / BUNDLE
IN STOCK Reduce your carton SKU count with these pre-scored 6x6x4 multi-depth corrugated boxes. Fold to your exact height without a carton sizer–perfect fit every time. ECT-32 kraft construction means strong protection at the lowest landed cost per shipment.
Boxes - Corrugated

6x6x4 ECT-32 Kraft Adjustable Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD664

6 x 6 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$12.22 / BUNDLE
IN STOCK ECT-32 single wall corrugated boxes in 6" 6" 4" dimensions–ideal for mid-size product shipping and storage. Each bundle contains 25 kraft cartons built for standard-strength applications. Recyclable material reduces waste while maximizing freight efficiency.
Boxes - Corrugated

6x6x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 664

6 x 6 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$10.90 / BUNDLE
IN STOCK Dependable ECT-32 kraft corrugated boxes sized 6" 6" 3" for efficient small-item shipping and storage. Sold in bundles of 25 to maximize volume savings for warehouse operations. Single-wall construction balances protection with freight cost efficiency.
Boxes - Corrugated

6x6x3 ECT-32 Kraft Corrugated Shipping Boxes

PN: 663

6 x 6 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$11.58 / BUNDLE
IN STOCK Engineered for high-performance warehouse operations: these ECT-44 single wall kraft corrugated boxes deliver 40% greater stacking strength than standard shipping containers. At 6" x 6" x 6", they maximize cube utilization while minimizing freight costs. Sold flat in bundles of 25 for efficient storage and rapid deployment.
Boxes - Corrugated

6x6x6 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD666

6 x 6 x 6 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$18.87 / BUNDLE
IN STOCK Professional-grade 6x6x6" white corrugated boxes with ECT-32 single-wall construction deliver the same durability as kraft cartons with superior label visibility. Ideal for e-commerce, fulfillment, and branded shipments. Sold in bundles of 25 for volume savings and consistent inventory management.
Boxes - Corrugated

6x6x6 ECT-32 White Corrugated Shipping Boxes 25-Pack

PN: 666W

6 x 6 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$16.20 / BUNDLE
IN STOCK Adjust box height on-demand with our 6x6x6 multi-depth corrugated boxes–no carton sizer required. Scored at multiple depths to fold from 2" to 6" height, eliminating the need for multiple carton sizes in your warehouse. ECT-32 kraft construction rated for reliable stacking and freight protection.
Boxes - Corrugated

6x6x6 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD666

6 x 6 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$16.04 / BUNDLE
IN STOCK Premium ECT-32 kraft corrugated cube boxes sized 6" x 6" x 6" for optimal packaging of round, cylindrical, and irregularly shaped items. Each bundle includes 25 flat-shipped boxes, maximizing freight efficiency and storage. Ideal for warehouse managers and fulfillment operations seeking reliable, cost-effective shipping cartons.
Boxes - Corrugated

6x6x6 ECT-32 Kraft Corrugated Cube Shipping Box 25-Pack

PN: 666

6 x 6 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$12.81 / BUNDLE
IN STOCK ECT-32 white corrugated boxes sized 6x6x4 deliver industry-standard strength with pristine label appeal. Each 25-pack features single-wall construction rated for reliable stacking and freight efficiency. The white finish makes printed labels and shipping instructions stand out clearly during fulfillment and transit.
Boxes - Corrugated

6x6x4 ECT-32 White Corrugated Shipping Boxes Single Wall 25-Pack

PN: 664W

6 x 6 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$15.54 / BUNDLE
IN STOCK Engineered for shallow-product shipping, these 6x6x2 corrugated boxes feature ECT-32 kraft construction and ship flat to maximize warehouse efficiency. Ideal for apparel, books, picture frames, and artwork. Sold as a bundle of 25 to reduce per-unit costs and storage footprint.
Boxes - Corrugated

6x6x2 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 662

6 x 6 x 2 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$18.55 / BUNDLE
IN STOCK Tall 4x4x8 corrugated boxes built from ECT-32 single wall kraft for reliable protection of elongated items. End-loading design enables fast packing and sealing. Sold flat in bundles of 25 for maximum freight efficiency and storage savings.
Boxes - Corrugated

4x4x8 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 25-Pack

PN: 448

4 x 4 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$13.76 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 6" 4" 8" deliver reliable mid-range stacking strength for standard shipping and storage applications. Sold in bundles of 25 to support high-volume warehouse operations. Fully recyclable kraft material reduces environmental impact while maintaining cost efficiency.
Boxes - Corrugated

6x4x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 648

6 x 4 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$22.32 / BUNDLE
IN STOCK Dependable ECT-32 kraft corrugated boxes sized 7" 6" 5" for mid-range product shipping and storage. Sold in bundles of 25 for efficient warehouse stocking. Built for standard-strength applications with proven stacking performance and recyclable materials.
Boxes - Corrugated

7x6x5 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 765

7 x 6 x 5 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$20.38 / BUNDLE
IN STOCK Engineered for maximum protection and stacking performance, these 6x6x6 double wall corrugated boxes feature ECT-48 kraft construction that delivers exceptional crush resistance and durability. Bundle of 15 ships flat, reducing storage footprint and freight costs for your operation.
Boxes - Corrugated

6x6x6 ECT-48 Kraft Heavy-Duty Corrugated Double Wall Shipping Boxes 15-Pack

PN: HD666DW

6 x 6 x 6 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$20.21 / BUNDLE

Product Help Request

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Buying path

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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 ->