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 ECT-32 single wall kraft corrugated boxes in 20x12x8 dimensions deliver reliable strength for standard industrial shipping and storage. This 20-box bundle maximizes freight efficiency and reduces per-unit costs for warehouse managers handling moderate-weight products. Fully recyclable and built for sustainable fulfillment operations.
Boxes - Corrugated

20x12x8 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 20128

20 x 12 x 8 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$35.70 / BUNDLE
IN STOCK 20x12x7 Kraft Corrugated Shipping Boxes, 450 Pack Pallet, 32 ECT
Boxes - Corrugated

20x12x7 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 20127

20 x 12 x 7 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$62.89 / BUNDLE
IN STOCK ECT-48 heavy-duty double wall corrugated boxes built for demanding warehouse and fulfillment operations. These 20x12x6" kraft cartons deliver superior stacking strength and crush resistance while shipping flat to maximize storage efficiency. Bundle of 15 boxes reduces per-unit cost and freight expenses.
Boxes - Corrugated

20x12x6 ECT-48 Kraft Double Wall Corrugated Boxes 15-Pack

PN: HD20126DW

20 x 12 x 6 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$61.98 / BUNDLE
IN STOCK Ship smarter with these 20x12x3 shallow-depth corrugated boxes made from ECT-32 kraft material. Each bundle of 25 arrives flat to maximize your warehouse storage and cut freight costs. Ideal for apparel, books, frames, and artwork–engineered for efficient packing and stacking.
Boxes - Corrugated

20x12x3 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 20123

20 x 12 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$54.57 / BUNDLE
IN STOCK 19x13x10 Kraft Corrugated Shipping Boxes, 350 Pack Pallet, 32 ECT
Boxes - Corrugated

19x13x10 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 191310

19 x 13 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$82.67 / BUNDLE
IN STOCK ECT-32 kraft corrugated cartons sized 19" × 13" × 6" with shallow depth for optimal fit on small-profile items. Ships flat to maximize storage efficiency and reduce freight costs. Bundle of 25 boxes ready to assemble.
Boxes - Corrugated

19x13x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 19136

19 x 13 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$72.47 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 18" × 14" × 14"–engineered for reliable mid-weight shipments and warehouse storage. Sold as a bundle of 20 units for volume efficiency. Recyclable kraft construction reduces packaging waste while maintaining standard industrial strength.
Boxes - Corrugated

18x14x14 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 181414

18 x 14 x 14 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$49.21 / BUNDLE
IN STOCK Packrift's 18x14x12" ECT-32 kraft corrugated boxes deliver reliable mid-range strength for standard industrial shipping and storage applications. Each bundle contains 25 boxes, maximizing freight efficiency and reducing per-unit costs. Fully recyclable kraft construction suitable for e-commerce, retail, and warehouse environments.
Boxes - Corrugated

18x14x12 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 181412

18 x 14 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$51.20 / BUNDLE
IN STOCK ECT-32 single-wall corrugated boxes engineered for reliable mid-weight industrial shipping. 18" × 14" × 10" dimensions deliver optimal freight efficiency with strong stacking performance. Sold in bundles of 25 kraft boxes–reduce per-unit costs and minimize packaging waste with recyclable material.
Boxes - Corrugated

18x14x10 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 181410

18 x 14 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$54.10 / BUNDLE
IN STOCK Reliable ECT-32 kraft corrugated shipping boxes sized 18" × 14" × 8" for mid-range freight and product storage. Sold in bundles of 20 to maximize your shipping efficiency and reduce per-unit costs. Single-wall construction balances protection with lightweight handling.
Boxes - Corrugated

18x14x8 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 18148

18 x 14 x 8 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$35.91 / BUNDLE
IN STOCK Optimize your fulfillment with these 18x14x6" ECT-32 kraft corrugated boxes–engineered for shallow products like apparel, books, and artwork. Ships flat to maximize warehouse storage efficiency and reduce freight spend. Sold as a convenient bundle of 25.
Boxes - Corrugated

18x14x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 18146

18 x 14 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$45.03 / BUNDLE
IN STOCK Ship shallow products efficiently with these 18x14x4" ECT-32 kraft corrugated boxes. Ideal for apparel, books, artwork, and frames with minimal void fill. Sold in bundles of 25 and ship flat to maximize your warehouse storage and reduce freight costs.
Boxes - Corrugated

18x14x4 ECT-32 Kraft Corrugated Boxes 25-Pack

PN: 18144

18 x 14 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$40.71 / BUNDLE
IN STOCK 16x16x15 Kraft Corrugated Shipping Boxes, 425 Pack Pallet, 32 ECT
Boxes - Corrugated

16x16x15 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 161615

16 x 16 x 15 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$67.97 / BUNDLE
IN STOCK Heavy-duty 16x16x14 corrugated shipping boxes built for demanding warehouse operations. ECT-32 kraft construction delivers reliable stacking strength and crush resistance for mid-weight product protection. Bundle of 25 cartons optimized for freight efficiency and cost-per-box savings.
Boxes - Corrugated

16x16x14 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 161614

16 x 16 x 14 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$66.57 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 16" × 16" × 13" dimensions deliver reliable single-wall protection for mid-weight shipments and storage. Sold as a bundle of 25 boxes, these brown cardboard shipping containers offer excellent stacking strength and freight efficiency for warehouse and fulfillment operations. Recyclable kraft material reduces your environmental footprint while maximizing warehouse ROI.
Boxes - Corrugated

16x16x13 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 161613

16 x 16 x 13 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$64.39 / BUNDLE
IN STOCK Reliable ECT-32 single wall corrugated boxes in 16x16x12" dimensions, sold by the bundle of 25. Built for standard shipping loads, stacking stability, and cost-efficient warehouse operations. Kraft material is fully recyclable and ready for immediate deployment.
Boxes - Corrugated

16x16x12 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 161612

16 x 16 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$60.07 / 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

Use filters and product titles to narrow by the specs that affect fit.

Confirm

Open the product page before ordering a case so you can check quantity, unit, and limits.

Reorder

Save the SKU or product link for repeat purchasing and support questions.

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 ->