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 Professional-grade 12x12x6 white corrugated boxes with ECT-32 single-wall construction deliver reliable protection and clean appearance for labeled shipments. Same strength as kraft cartons with crisp white background that makes labels and shipping instructions pop. Sold as convenient bundle of 25.
Boxes - Corrugated

12x12x6 ECT-32 White Corrugated Shipping Boxes Single Wall 25-Pack

PN: 12126W

12 x 12 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$39.42 / BUNDLE
IN STOCK Streamline your fulfillment operation with scored multi-depth corrugated boxes that fold to four different heights–eliminating the need for multiple SKUs. These ECT-32 kraft boxes deliver superior stacking performance and reduce parcel shipping costs by right-sizing every shipment. Bundle of 25 ready to ship.
Boxes - Corrugated

12x12x4 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD12124

12 x 12 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$32.39 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 12x12x3 dimensions deliver the ideal shallow-depth shipping solution for lightweight products like apparel, books, and artwork. Ships flat in 25-pack bundles to minimize storage footprint and reduce freight costs. Strong single-wall construction ensures reliable protection at scale.
Boxes - Corrugated

12x12x3 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 12123

12 x 12 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$26.30 / BUNDLE
IN STOCK 12x12x2 Kraft Corrugated Shipping Boxes, 625 Pack Pallet, 32 ECT
Boxes - Corrugated

12x12x2 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 12122

12 x 12 x 2 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$45.77 / BUNDLE
IN STOCK 11x11x13 Kraft Corrugated Shipping Boxes, 475 Pack Pallet, 32 ECT
Boxes - Corrugated

11x11x13 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 111113

11 x 11 x 13 in ECT-32 Corrugated 25 PER BUNDLE
$60.46 / BUNDLE
IN STOCK 10x10x14" ECT-32 Kraft Corrugated Boxes - 25-Pack Bundle
Boxes - Corrugated

10x10x14 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 101014

10 x 10 x 14 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$36.27 / BUNDLE
IN STOCK Ship tall items efficiently with our 8x8x16 corrugated boxes made from ECT-32 kraft material. End-loading design for fast packing and sealing. Sold as a bundle of 25 flat boxes–ready to expand your fulfillment capacity.
Boxes - Corrugated

8x8x16 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 8816

8 x 8 x 16 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$28.17 / BUNDLE
IN STOCK Ship tall items efficiently with our 4x4x20" ECT-32 kraft corrugated boxes. End-loading design enables fast packing; strong single-wall construction handles demanding fulfillment. Bundle of 25 boxes ships flat for maximum freight efficiency and warehouse storage savings.
Boxes - Corrugated

4x4x20 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4420

4 x 4 x 20 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$28.70 / BUNDLE
IN STOCK V3c 350# single wall corrugated boxes engineered for maximum durability and weather resistance. Each bundle delivers 20 kraft boxes at 12x12x12", constructed with water-resistant adhesive (WRA) to protect equipment and parts during storage and shipment. Military specification certified performance.
Boxes - Corrugated

12x12x12 V3c 350# Single Wall Corrugated Box 20-Pack

PN: 121212V3C

12 x 12 x 12 in V3c - 350# Single Wall Corrugated 20 PER BUNDLE
$204.90 / BUNDLE
IN STOCK Ship smarter with these 12 x 10 x 14" ECT-32 kraft corrugated boxes. Engineered for reliable stacking performance and packed in convenient bundles of 25 that arrive flat-folded to slash storage overhead. Industry-standard construction meets your volume shipping demands without breaking your budget.
Boxes - Corrugated

12x10x14 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 121014

12 x 10 x 14 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$58.67 / BUNDLE
IN STOCK 8x8x11 Kraft Corrugated Shipping Boxes, 875 Pack Pallet, 32 ECT
Boxes - Corrugated

8x8x11 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 8811

8 x 8 x 11 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$32.45 / BUNDLE
IN STOCK Ship tall items efficiently with our 6x6x18 corrugated boxes featuring ECT-32 single-wall kraft construction. Perfect for trophies, shelving, fishing rods, and items traditionally packed in mailing tubes. Sold flat in convenient 25-box bundles to maximize freight efficiency and warehouse storage.
Boxes - Corrugated

6x6x18 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 6618

6 x 6 x 18 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$33.29 / BUNDLE
IN STOCK Heavy-duty ECT-32 kraft corrugated boxes in 15x10x7 dimensions–the industry standard for mid-size product shipments. Ships and stores flat to maximize warehouse efficiency. Sold as a bundle of 25 boxes.
Boxes - Corrugated

15x10x7 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 15107

15 x 10 x 7 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$50.87 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 14" 11" 11" deliver standard-strength performance for mid-weight shipping and storage applications. Each bundle includes 25 boxes manufactured from single-wall corrugated material, providing reliable protection and cost efficiency for warehouse and fulfillment operations. Recyclable kraft construction reduces environmental impact while maintaining structural integrity.
Boxes - Corrugated

14x11x11 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 141111

14 x 11 x 11 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$38.92 / BUNDLE
IN STOCK Pre-scored multi-depth corrugated boxes fold to 6", 5", or 4" heights–eliminate inventory bloat and right-size shipments for parcel service savings. ECT-32 kraft construction delivers dependable protection without requiring a carton sizer. Buy in bundles of 25 and consolidate your box SKUs today.
Boxes - Corrugated

12.5x12.5x6 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD12126R

12 1/2 x 12 1/2 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$38.59 / BUNDLE
IN STOCK ECT-71 heavy-duty double wall corrugated boxes engineered for maximum protection and stacking performance. These 12x12x12 kraft cartons deliver 140# capacity per parcel standards, reducing freight costs through optimal cube utilization. Bundle of 15 boxes.
Boxes - Corrugated

12x12x12 ECT-71 Heavy-Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD121212HDDW

12 x 12 x 12 in ECT-71 Double Wall Corrugated 15 PER BUNDLE
$131.31 / 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 ->