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 12x9x9 double wall corrugated boxes rated ECT-48 for maximum stacking performance and freight protection. Ship flat to reduce storage footprint. Bundle of 15 boxes per unit–ideal for high-volume fulfillment operations.
Boxes - Corrugated

12x9x9 ECT-48 Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD1299DW

12 x 9 x 9 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$46.09 / BUNDLE
IN STOCK Move inventory faster with ECT-32 single wall corrugated boxes sized 12" 9" 9"–the ideal dimensions for small-to-medium freight without wasted space. This bundle of 25 kraft cartons delivers proven stacking performance and reliable protection at volume cost savings. Recyclable and warehouse-ready.
Boxes - Corrugated

12x9x9 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1299

12 x 9 x 9 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$26.62 / BUNDLE
IN STOCK Professional-grade 12 x 9 x 6 double wall corrugated boxes built from ECT-48 kraft for maximum stacking strength and impact protection. Each bundle of 15 ships flat, reducing your warehouse footprint and freight costs. Ideal for e-commerce fulfillment centers and warehouse managers shipping mid-weight products.
Boxes - Corrugated

12x9x6 ECT-48 Kraft Double Wall Corrugated Boxes 15-Pack

PN: HD1296DW

12 x 9 x 6 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$38.14 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes in 12" x 9" x 3" dimensions–engineered for shallow product categories like apparel, books, and artwork. Ships flat to maximize warehouse storage efficiency and reduce inbound freight costs. Bundle of 25 cartons.
Boxes - Corrugated

12x9x3 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1293

12 x 9 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$20.47 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 12" 9" 2" shallow depth design–engineered for compact products and maximum freight efficiency. Sold as a convenient bundle of 25 flat cartons that arrive compressed to minimize your warehouse footprint and reduce inbound shipping costs.
Boxes - Corrugated

12x9x2 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1292

12 x 9 x 2 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$26.65 / BUNDLE
IN STOCK Ship shallow products efficiently with our 12x8x3 ECT-32 kraft corrugated boxes. These flat cartons reduce dimensional weight charges while maintaining full stacking strength for warehouse operations. Bundle of 25 boxes ships flat to maximize your storage density and cut freight costs.
Boxes - Corrugated

12x8x3 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1283

12 x 8 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$27.25 / BUNDLE
IN STOCK 11.25x8.75x12 ECT-44 Kraft Corrugated Boxes - 40% Stronger, Bundle of 25
Boxes - Corrugated

11.25x8.75x12 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD11812

11 1/4 x 8.75 x 12 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$39.14 / BUNDLE
IN STOCK 11.25x8.75x12 White Corrugated Boxes ECT-32 Single Wall - 25 Pack
Boxes - Corrugated

11.25x8.75x12 ECT-32 White Corrugated Shipping Boxes 25-Pack

PN: 11812W

11 1/4 x 8.75 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$49.70 / BUNDLE
IN STOCK Industrial-grade ECT-32 kraft corrugated boxes sized 9" x 9" x 12"–engineered for reliable stacking and standard shipping applications. This 25-box bundle delivers cost-efficient packaging for fulfillment centers and warehouses. Recyclable kraft material meets sustainability goals while maintaining proven durability.
Boxes - Corrugated

9x9x12 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 9912

9 x 9 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$28.12 / BUNDLE
IN STOCK Reliable ECT-32 single-wall corrugated boxes sized 12.25" x 9.25" x 6" for mid-sized shipments and storage. This 25-box bundle ships and stores flat, reducing your warehouse footprint and freight costs. Industry-standard kraft construction delivers consistent stacking performance.
Boxes - Corrugated

12.25x9.25x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1296R

12 1/4 x 9.25 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$35.72 / BUNDLE
IN STOCK 11.25x3x15.125 White Self-Seal Corrugated Box - ECT-32, Bundle of 25
Boxes - Corrugated

11.25x3x15.125 ECT-32 White Corrugated Shipping Boxes 25-Pack

PN: 11315SSFOL

11 1/4 x 3 x 15 1/8 in ECT-32 Corrugated 25 PER BUNDLE
$114.01 / BUNDLE
IN STOCK 7x7x14 Kraft Corrugated Shipping Boxes, 825 Pack Pallet, 32 ECT
Boxes - Corrugated

7x7x14 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 7714

7 x 7 x 14 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$33.74 / BUNDLE
IN STOCK Eliminate carton sizer complexity with pre-scored multi-depth corrugated boxes that fold to fit your product. These 12.25" x 9.25" x 12" kraft boxes feature ECT-32 single-wall construction and score lines at multiple depths, allowing one SKU to replace 3-4 traditional fixed-height cartons. Shipped as a bundle of 25.
Boxes - Corrugated

12.25x9.25x12 ECT-32 Multi-Depth Kraft Corrugated Shipping Boxes 25-Pack

PN: MD12912

12 1/4 x 9.25 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$36.22 / BUNDLE
IN STOCK Protect catalogs, letterhead, and printed materials with ECT-32 kraft corrugated boxes sized for standard paper formats. These 12.25" 9.25" 12" shipping cartons offer reliable single-wall protection in bundles of 25, reducing per-unit costs and warehouse space.
Boxes - Corrugated

12.25x9.25x12 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 12912R

12 1/4 x 9.25 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$32.43 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes in 12.25" x 9.25" x 9" dimensions deliver proven stacking performance for mid-weight shipping and storage. This 25-box bundle offers cost-efficient packaging for warehouse and fulfillment operations. Recyclable kraft construction meets sustainability goals without compromising durability.
Boxes - Corrugated

12.25x9.25x9 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1299R

12 1/4 x 9.25 x 9 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$32.73 / BUNDLE
IN STOCK Ship long, narrow items efficiently with 16x6x6 kraft corrugated cartons featuring easy-access long-side openings. ECT-32 single-wall construction delivers reliable protection while maximizing freight efficiency. Sold flat in bundles of 25 for streamlined warehouse storage.
Boxes - Corrugated

16x6x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1666

16 x 6 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$22.57 / BUNDLE

Product Help Request

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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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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 ->