Boxes & Mailers

SELECTION EXPERT ADVICE

Wall Strength & Load Capacity
MORE INFO
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
MORE INFO
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
MORE INFO
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 Move inventory faster with our 18x10x10 corrugated shipping boxes–ECT-32 rated single-wall kraft construction delivers proven stacking strength and cost efficiency. Sold as a 25-box bundle, ideal for small-to-medium parcel fulfillment. Recyclable kraft cartons engineered for reliability.
Boxes - Corrugated

18x10x10 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 181010

18 x 10 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$39.57 / BUNDLE
IN STOCK Heavy-duty ECT-44 kraft corrugated boxes engineered for maximum stacking performance and freight efficiency. These 17 1/4 x 11 1/4 x 6" cartons deliver 40% greater strength than standard shipping containers, protecting your products through the supply chain. Sold flat in convenient bundles of 25 for optimal storage and handling.
Boxes - Corrugated

17 1/4x11 1/4x6 ECT-44 Kraft Heavy-Duty Corrugated Boxes 25-Pack

PN: HD17116

17 1/4 x 11 1/4 x 6 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$45.95 / BUNDLE
IN STOCK Pre-scored multi-depth corrugated boxes collapse to 3, 4, or 6-inch heights–no carton sizer needed. ECT-32 kraft construction delivers durability while reducing your SKU count and parcel shipping expenses. Sold as a bundle of 25.
Boxes - Corrugated

17.25x11.25x6 ECT-32 Multi-Depth Kraft Corrugated Shipping Boxes 25-Pack

PN: MD17116

17 1/4 x 11.25 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$34.53 / BUNDLE
IN STOCK ECT-32 single wall corrugated boxes in 17x11x8" dimensions deliver proven stacking strength for mid-weight shipments. These kraft cartons ship and store flat, maximizing your warehouse cubic utilization. Bundle of 25 boxes reduces per-unit cost and freight waste.
Boxes - Corrugated

17x11x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 17118R

17 x 11 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$53.55 / BUNDLE
IN STOCK ECT-32 rated kraft corrugated boxes sized 16"L × 12"W × 14"H for medium-duty shipping and storage. Ship flat to maximize warehouse space and reduce freight costs. Sold as a bundle of 25 boxes–the industry standard for fulfillment centers and distribution operations.
Boxes - Corrugated

16x12x14 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 161214

16 x 12 x 14 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$88.23 / BUNDLE
IN STOCK Premium 16 x 12 x 12" corrugated packing boxes engineered for high-volume movers and fulfillment operations. ECT-32 single-wall kraft construction delivers proven stacking strength and crush resistance. Bundle of 25 units with patented flap-lock design keeps flaps secure during handling and transit.
Boxes - Corrugated

16x12x12 ECT-32 Kraft Corrugated Moving Boxes 25-Pack

PN: 161212DPB

16 x 12 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$57.48 / BUNDLE
IN STOCK Premium ECT-48 double wall corrugated boxes designed for high-performance shipping and storage. These 16" x 12" x 12" kraft cartons deliver superior stacking strength and impact protection for demanding fulfillment operations. Bundle of 15 ships flat to maximize warehouse efficiency and reduce freight costs.
Boxes - Corrugated

16x12x12 ECT-48 Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD161212DW

16 x 12 x 12 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$46.21 / BUNDLE
IN STOCK Heavy-duty ECT-44 kraft corrugated boxes engineered for demanding warehouse and fulfillment operations. These 16x12x12 single wall shipping cartons deliver 40% greater stacking strength than standard containers, reducing damage claims and optimizing pallet density. Sold flat in convenient bundles of 15 for maximum volume efficiency.
Boxes - Corrugated

16x12x12 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 15-Pack

PN: HD161212

16 x 12 x 12 in ECT-44 Single Wall Corrugated 15 PER BUNDLE
$36.96 / BUNDLE
IN STOCK Professional white corrugated boxes (16" x 12" x 12") with ECT-32 single-wall strength–the same durability as kraft cartons. Bundle of 25 boxes ideal for e-commerce fulfillment, retail packaging, and labeled shipments. Crisp white surface maximizes label visibility and brand presentation.
Boxes - Corrugated

16x12x12 ECT-32 White Corrugated Shipping Boxes 25-Pack

PN: 161212W

16 x 12 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$76.36 / BUNDLE
IN STOCK ECT-48 double wall corrugated boxes engineered for maximum protection and stacking performance. These 16x12x10 kraft cartons deliver heavy-duty construction at scale–ship flat in bundles of 15 to cut storage overhead and freight costs. Ideal for high-volume fulfillment operations.
Boxes - Corrugated

16x12x10 ECT-48 Kraft Heavy-Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD161210DW

16 x 12 x 10 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$64.62 / BUNDLE
IN STOCK 16x12x9 Kraft Corrugated Shipping Boxes, 675 Pack Pallet, 32 ECT
Boxes - Corrugated

16x12x9 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 16129R

16 x 12 x 9 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$41.07 / BUNDLE
IN STOCK Ship with confidence using these 16x12x8 double wall corrugated boxes engineered with ECT-48 kraft material for maximum stacking performance and freight protection. Each bundle of 15 ships flat, reducing storage footprint and freight costs by up to 40% compared to assembled alternatives. Ideal for warehouse managers moving mid-weight products with zero damage tolerance.
Boxes - Corrugated

16x12x8 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD16128DW

16 x 12 x 8 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$58.64 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes sized 16" x 12" x 7" for reliable mid-weight shipping and storage. Sold in bundles of 25 to maximize freight efficiency and reduce per-unit costs. Fully recyclable cardboard construction meets standard industrial packaging requirements.
Boxes - Corrugated

16x12x7 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 16127

16 x 12 x 7 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$37.66 / BUNDLE
IN STOCK Engineered for maximum protection and stacking performance, these 16" x 12" x 6" double wall corrugated boxes deliver ECT-48 heavy-duty kraft construction. Each bundle of 15 ships flat, reducing storage footprint and freight costs while providing the durability your warehouse demands. Ideal for e-commerce fulfillment, freight consolidation, and high-volume operations.
Boxes - Corrugated

16x12x6 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD16126DW

16 x 12 x 6 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$58.49 / BUNDLE
IN STOCK Ship smart with our 16x12x3" ECT-32 kraft corrugated cartons–engineered for shallow products like apparel, books, and picture frames. Each bundle of 25 arrives flat to maximize your warehouse storage and cut freight costs. Reliable single-wall construction rated for secure stacking and handling.
Boxes - Corrugated

16x12x3 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 16123

16 x 12 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$46.04 / BUNDLE
IN STOCK ECT-44 single wall kraft corrugated boxes deliver 40% greater stacking strength than standard shipping containers–ideal for high-volume fulfillment centers and warehouse operations. Each 14x14x14" carton maximizes pallet density while protecting mid-weight products. Sold flat in convenient 25-box bundles for efficient storage and quick deployment.
Boxes - Corrugated

14x14x14 ECT-44 Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD141414

14 x 14 x 14 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$68.63 / 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 ->