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-B kraft corrugated mailers engineered for small parcel shipping and fragile item protection. These one-piece, crush-resistant mailers fold flat for space-efficient storage and reduce dimensional weight charges. Bundle of 50 ships ready to deploy–no tape, glue, or staples required.
Boxes - Mailers

12x6x6 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1266K

12 x 6 x 6 in ECT-32-B Corrugated 50 PER BUNDLE
$89.63 / BUNDLE
IN STOCK Ship small, fragile items with confidence using these 12x6x4 kraft corrugated mailers made from ECT-32-B material. Double-wall crush-resistant construction requires no tape, glue, or staples–fold and pack in seconds. Bundle of 50 ships flat to maximize storage efficiency and reduce freight costs.
Boxes - Mailers

12x6x4 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1264K

12 x 6 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$72.92 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B kraft corrugated mailers featuring crush-resistant, one-piece fold-and-tuck construction. At 12" x 4" x 4", these die-cut mailers provide double-wall protection on front and sides while shipping flat to maximize warehouse storage. Bundle of 50 units–no tape, glue, or staples required.
Boxes - Mailers

12x4x4 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1244K

12 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$61.52 / BUNDLE
IN STOCK Reduce shipping costs with these lightweight 12x4x2 kraft corrugated mailers manufactured from durable ECT-32-B material. One-piece fold-and-tuck design requires no tape, glue, or staples and provides double-wall crush resistance on front and sides. Bundle of 50 ships flat to maximize storage efficiency in your warehouse.
Boxes - Mailers

12x4x2 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1242K

12 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$30.38 / BUNDLE
IN STOCK 10x7x3 Kraft Corrugated Mailers ECT-32-B, Bundle of 50
Boxes - Mailers

10x7x3 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1073K

10 x 7 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$79.75 / BUNDLE
IN STOCK 10x6x6 ECT-32 Kraft Corrugated Mailers, 50/Bundle
Boxes - Mailers

10x6x6 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1066K

10 x 6 x 6 in ECT-32-B Corrugated 50 PER BUNDLE
$76.75 / BUNDLE
IN STOCK One-piece kraft corrugated mailers with double-wall crush-resistant construction–no tape, glue, or staples required. These 10x6x4" ECT-32-B mailers fold flat for space-efficient storage and ship in bundles of 50, delivering maximum protection with minimal assembly time.
Boxes - Mailers

10x6x4 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1064K

10 x 6 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$71.40 / BUNDLE
IN STOCK Premium ECT-32-B kraft corrugated mailers in 10x5x5 dimensions–engineered for crush resistance and maximum protection. One-piece fold-and-tuck design requires no tape, glue, or staples. Ships and stores flat to reduce warehouse footprint and freight costs. Bundle of 50.
Boxes - Mailers

10x5x5 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1055K

10 x 5 x 5 in ECT-32-B Corrugated 50 PER BUNDLE
$69.88 / BUNDLE
IN STOCK 10x4x4" ECT-32 Kraft Corrugated Mailers, 50-Pack
Boxes - Mailers

10x4x4 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1044K

10 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$58.49 / BUNDLE
IN STOCK 10x4x3" ECT-32-B Kraft Corrugated Mailers, Bundle of 50
Boxes - Mailers

10x4x3 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1043K

10 x 4 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$35.77 / BUNDLE
IN STOCK 10x4x2 Kraft Corrugated Mailers ECT-32 - 50/Bundle
Boxes - Mailers

10x4x2 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1042K

10 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$47.09 / BUNDLE
IN STOCK 10x3x3 Kraft Corrugated Mailers ECT-32 50/Bundle
Boxes - Mailers

10x3x3 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M1033K

10 x 3 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$67.16 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B kraft corrugated mailers. One-piece fold-and-tuck design with double-wall protection requires no tape, glue, or staples–ready to use in seconds. 50/bundle ships flat for maximum warehouse efficiency and reduced postage costs.
Boxes - Mailers

9x7x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M974K

9 x 7 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$72.16 / BUNDLE
IN STOCK ECT-32-B kraft corrugated mailers deliver double-wall crush resistance in a one-piece, fold-and-tuck design that requires no tape, glue, or staples. These 9" x 6" x 4" shipping mailers fold flat for 50% storage savings while protecting small items like tools, glassware, and fragile products. Bundle of 50 keeps your fulfillment operation efficient and cost-effective.
Boxes - Mailers

9x6x4 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: MLR964K

9 x 6 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$69.88 / BUNDLE
IN STOCK Ship small items with confidence using our 9x6x3 kraft corrugated mailers. ECT-32-B crush-resistant construction provides double-wall protection on front and sides, while the one-piece fold-and-tuck design requires no tape, glue, or staples. Bundle of 50 ships and stores flat to maximize warehouse efficiency and reduce freight costs.
Boxes - Mailers

9x6x3 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M963K

9 x 6 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$64.56 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated mailers built for small item shipping. One-piece fold-and-tuck design creates double-wall protection on front and sides–no tape, glue, or staples needed. Ships and stores flat to maximize warehouse efficiency. 50 mailers per bundle.
Boxes - Mailers

9x6x2 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: MLR962K

9 x 6 x 2 in ECT-32 Single Wall Corrugated 50 PER BUNDLE
$62.28 / 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

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

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 ->