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 Ship small items with confidence using these ECT-32-B kraft corrugated mailers featuring double-wall crush-resistant construction. The one-piece folding design requires no tape, glue, or staples–simply fold and tuck in seconds. Bulk 50-pack ships flat to maximize warehouse efficiency and minimize freight costs.
Boxes - Mailers

9x4x4 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M944K

9 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$54.69 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B kraft corrugated mailers. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly takes seconds. Double-wall crush-resistant construction protects fragile products while flat storage maximizes warehouse space. Bundle of 50.
Boxes - Mailers

9x4x3 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M943K

9 x 4 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$55.14 / BUNDLE
IN STOCK Lightweight ECT-32-B kraft corrugated mailers engineered for small-parcel shipping. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly takes seconds. Ships and stores flat to maximize warehouse efficiency. Bundle of 50.
Boxes - Mailers

9x3x3 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M933K

9 x 3 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$43.29 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B kraft corrugated mailers. One-piece fold-and-tuck design delivers double-wall protection on front and sides without tape, glue, or staples. Bundle of 50 ships flat to maximize warehouse efficiency and minimize storage footprint.
Boxes - Mailers

8x8x4 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M884K

8 x 8 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$85.07 / BUNDLE
IN STOCK Ship small, fragile items with confidence using these ECT-32-B kraft corrugated mailers. One-piece fold-and-tuck design eliminates tape and glue while delivering double-wall crush protection. Bundle of 50 ships and stores flat–maximize warehouse efficiency and freight savings.
Boxes - Mailers

8x6x4 ECT-32 Kraft Corrugated Mailers 50/Bundle

PN: M864K

8 x 6 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$92.40 / BUNDLE
IN STOCK ECT-32-B crush-resistant mailers deliver double-wall protection in a one-piece folding design–no tape, glue, or staples required. Ships and stores completely flat, reducing warehouse footprint and postage costs. Perfect for small, fragile items requiring reliable protection.
Boxes - Mailers

8x6x3 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M863K

8 x 6 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$62.28 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B kraft corrugated mailers. Double-wall crush-resistant construction requires zero assembly–just fold and seal. 50-pack bundle delivers superior protection and maximum freight efficiency for warehouse operations.
Boxes - Mailers

8x6x2 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M862K

8 x 6 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$61.52 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B kraft corrugated mailers. One-piece fold-and-tuck design delivers double-wall crush resistance on front and sides–no tape, glue, or staples required. Bundle of 50 mailers ships and stores flat to maximize warehouse efficiency.
Boxes - Mailers

8x5x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M854K

8 x 5 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$47.85 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B kraft corrugated mailers. One-piece fold-and-tuck construction delivers double-wall protection on front and sides–no tape, glue, or staples required. Ships and stores flat to maximize warehouse efficiency; sold in bundles of 50.
Boxes - Mailers

8x5x3 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M853K

8 x 5 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$42.47 / BUNDLE
IN STOCK Lightweight 8x5x2" kraft corrugated mailers engineered with ECT-32-B strength for maximum crush resistance on small shipments. One-piece fold-and-tuck design eliminates tape, glue, and staples–ready to use in seconds. Ships and stores flat to maximize warehouse efficiency; sold as bundle of 50.
Boxes - Mailers

8x5x2 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M852K

8 x 5 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$44.71 / BUNDLE
IN STOCK Ship small items faster with zero assembly. These 8x4x4 ECT-32-B kraft corrugated mailers feature one-piece fold-and-tuck construction with double-wall crush protection on front and sides. Bundle of 50 ships flat–cut storage footprint and freight costs immediately.
Boxes - Mailers

8x4x4 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M844K

8 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$53.17 / BUNDLE
IN STOCK ECT-32-B kraft corrugated mailers sized 8" 4" 3" deliver double-wall crush resistance in a one-piece, fold-and-tuck design that requires no tape, glue, or staples. Ships and stores flat to maximize warehouse efficiency. Bundle of 50 reduces per-unit costs and freight spend for high-volume shippers.
Boxes - Mailers

8x4x3 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M843K

8 x 4 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$49.37 / BUNDLE
IN STOCK ECT-32-B kraft corrugated mailers in 8x4x2 dimensions deliver double-wall protection with zero assembly required. These crush-resistant, one-piece folding mailers ship and store flat–reducing warehouse footprint and freight costs by up to 40%. Bundle of 50 units.
Boxes - Mailers

8x4x2 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M842K

8 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$44.05 / BUNDLE
IN STOCK Lightweight ECT-32-B kraft corrugated mailers sized 8"3"3" deliver double-wall crush protection with zero assembly hassle–fold and ship in seconds, no tape or adhesive required. Each bundle of 50 stores and ships flat, maximizing warehouse efficiency and reducing freight weight on every order.
Boxes - Mailers

8x3x3 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M833K

8 x 3 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$42.47 / BUNDLE
IN STOCK ECT-32-B kraft corrugated mailers deliver crush-resistant protection in a compact 8x3x2" format perfect for small item shipping. One-piece fold-and-tuck design requires no tape, glue, or staples–assemble in seconds and ship flat to maximize storage efficiency. Pack of 50 reduces per-unit costs and freight weight for volume shippers.
Boxes - Mailers

8x3x2 ECT-32 Kraft Corrugated Mailers 50/Bundle

PN: M832K

8 x 3 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$32.66 / BUNDLE
IN STOCK Lightweight 7x6x3" kraft corrugated mailers with ECT-32 crush-resistant construction reduce dimensional weight charges and cut shipping costs. One-piece fold-and-tuck design requires no tape or glue–assemble in seconds. Ships and stores flat. Bundle of 50.
Boxes - Mailers

7x6x3 ECT-32 Kraft Corrugated Mailers 50/Bundle

PN: M763K

7 x 6 x 3 in ECT-32 Single Wall Corrugated 50 PER BUNDLE
$64.56 / 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 ->