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 Ship small, fragile items securely with these ECT-32-B kraft corrugated mailers featuring double-wall crush-resistant protection. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly takes seconds. Bundle of 50 ships and stores flat to maximize your warehouse efficiency and reduce freight costs.
Boxes - Mailers

6x5x4 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M654K

6 x 5 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$64.95 / BUNDLE
IN STOCK Ship small items confidently with ECT-32-B kraft corrugated mailers engineered for crush resistance and lightweight postage savings. One-piece fold-and-tuck design requires no tape, glue, or staples–assemble in seconds and store completely flat. Bundle of 50 mailers ideal for warehouses handling fragile goods like tools, glassware, and small products.
Boxes - Mailers

6x5x3 ECT-32 Kraft Corrugated Mailers 50/Bundle

PN: M653K

6 x 5 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$57.73 / BUNDLE
IN STOCK Ship small, fragile items with confidence using these ECT-32-B kraft corrugated mailers. One-piece fold design requires no tape, glue, or staples–assemble in seconds with double-wall crush resistance on front and sides. Bundle of 50 ships and stores flat to maximize warehouse efficiency.
Boxes - Mailers

6x5x2 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M652K

6 x 5 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$44.81 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B crush-resistant kraft corrugated mailers. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly takes seconds. Bundle of 50 ships and stores flat to maximize warehouse efficiency and reduce freight costs.
Boxes - Mailers

6x4x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M644K

6 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$48.61 / BUNDLE
IN STOCK ECT-32-B kraft corrugated mailers engineered for small item protection and maximum freight efficiency. One-piece fold-and-tuck design–no tape, glue, or staples required. Ships and stores flat in 50-pack bundles to reduce warehouse space and cut postage costs.
Boxes - Mailers

6x4x3 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M643K

6 x 4 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$39.50 / BUNDLE
IN STOCK Ship with confidence using these ECT-32-B kraft corrugated mailers with crush-resistant, double-wall construction. One-piece design folds in seconds–no tape, glue, or staples required. Bundle of 50 units ships and stores flat to maximize warehouse efficiency.
Boxes - Mailers

6x4x2 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M642K

6 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$34.94 / BUNDLE
IN STOCK Lightweight ECT-32-B kraft corrugated mailers sized 6"x3"x3" with double-wall crush resistance and one-piece fold-and-tuck design. Ships and stores flat to maximize warehouse efficiency and reduce freight costs. Bundle of 50 mailers ready to assemble in seconds–no tape, glue, or staples required.
Boxes - Mailers

6x3x3 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M633K

6 x 3 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$32.66 / BUNDLE
IN STOCK Ship small, fragile items with confidence using these ECT-32-B kraft corrugated mailers. One-piece fold-and-tuck design provides double-wall protection on front and sides–no tape, glue, or staples required. Bundle of 50 ships and stores flat to maximize warehouse efficiency.
Boxes - Mailers

6x3x2 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M632K

6 x 3 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$28.86 / BUNDLE
IN STOCK Ship small items faster with zero-assembly one-piece mailers engineered for B2B efficiency. These 6x2x2 ECT-32 kraft corrugated mailers feature crush-resistant double-wall construction, fold flat for storage, and require no tape, glue, or staples. Bundle of 50 ships ready to deploy.
Boxes - Mailers

6x2x2 ECT-32 Kraft One-Piece Corrugated Mailers 50/Bundle

PN: M622K

6 x 2 x 2 in ECT-32 Single Wall Corrugated 50 PER BUNDLE
$23.55 / BUNDLE
IN STOCK Ship small items securely with our 5x5x4 kraft corrugated mailers–manufactured from ECT-32-B material for superior crush resistance and double-wall protection. One-piece fold-and-tuck design assembles in seconds with no tape, glue, or staples required. Bundle of 50 ships flat to maximize warehouse efficiency and reduce storage footprint.
Boxes - Mailers

5x5x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M554K

5 x 5 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$53.17 / BUNDLE
IN STOCK Ship small, fragile items with confidence using these ECT-32-B kraft corrugated mailers. One-piece design folds in seconds with no tape or glue required–double-wall construction on front and sides provides crush resistance. Bundle of 50 ships and stores flat to maximize warehouse efficiency.
Boxes - Mailers

5x5x3 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M553K

5 x 5 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$54.40 / BUNDLE
IN STOCK Ship small items faster with zero assembly. These 5x5x2 one-piece folding mailers feature ECT-32-B kraft corrugated construction with dual-wall crush resistance on front and sides. Bundle of 50 ships and stores flat–maximize warehouse efficiency and reduce postage spend.
Boxes - Mailers

5x5x2 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M552K

5 x 5 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$33.42 / BUNDLE
IN STOCK ECT-32-B kraft corrugated mailers engineered for maximum crush resistance in a compact 5x4x4" size. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly takes seconds. Ships and stores flat in bundles of 50 to maximize warehouse efficiency and reduce freight costs.
Boxes - Mailers

5x4x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M544K

5 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$44.81 / BUNDLE
IN STOCK Lightweight ECT-32-B kraft corrugated mailers engineered for small item shipping with zero assembly required. One-piece folding design creates double-wall protection on front and sides–no tape, glue, or staples needed. Ships and stores flat to maximize warehouse efficiency in bundles of 50.
Boxes - Mailers

5x4x3 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M543K

5 x 4 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$37.22 / BUNDLE
IN STOCK Lightweight ECT-32-B kraft corrugated mailers in a convenient 5x4x2" size, sold as a bundle of 50. One-piece fold design with double-wall protection on front and sides requires zero tape, glue, or staples–assemble in seconds and ship flat to maximize warehouse space.
Boxes - Mailers

5x4x2 ECT-32-B Kraft One-Piece Corrugated Mailers 50/Bundle

PN: M542K

5 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$33.42 / BUNDLE
IN STOCK Ship small, fragile items safely with our ECT-32-B kraft corrugated mailers in 5x3x3 size. One-piece fold-and-tuck design requires no tape, glue, or staples–assemble in seconds. Bundle of 50 ships flat to maximize warehouse storage and reduce freight expenses.
Boxes - Mailers

5x3x3 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M533K

5 x 3 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$31.90 / 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 ->