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 long, narrow items efficiently with our 10x6x6 ECT-32 kraft corrugated boxes. Extended length openings speed packing of wine bottles, umbrellas, carpet rolls, and similar products. Sold as a bundle of 25 flat boxes–ready to assemble and ship.
Boxes - Corrugated

10x6x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1066

10 x 6 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$15.83 / BUNDLE
IN STOCK Ship small, fragile items with confidence using these ECT-32-B white corrugated mailers. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly takes seconds. Double-wall crush-resistant construction protects contents while reducing freight weight and postage costs. 50-pack bundle.
Boxes - Mailers

7x5x4 White Corrugated Literature Mailers 50-Pack

PN: M754

7 x 5 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$44.38 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 12x10x4 dimensions deliver reliable protection for shallow products while minimizing dimensional weight charges. Ships flat in bundles of 25–reduce storage footprint and freight costs without compromise. Perfect for apparel, books, picture frames, and artwork.
Boxes - Corrugated

12x10x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 12104

12 x 10 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$22.56 / BUNDLE
IN STOCK 3.5x5 Clear 2 Mil Document Envelopes - Tamper Proof, Case of 1000 Packrift
Packing List Envelopes

3.5x5 2 Mil Clear Tamper Proof Self-Adhesive Packing List Envelopes 1000/Case

PN: PL471

3 1/2 x 5 in 2 Mil Poly 1000 PER CASE
$54.42 / CASE
IN STOCK 12x7.25 Kraft Self-Seal Bubble Mailers #1 - Lightweight Protection, Case/100
Envelopes & Mailers

12x7.25 #1 Kraft Self-Seal Bubble Mailers 100/Case B854SS

PN: B854SS

12 x 7.25 in Paper Exterior/Bubble Lining 100 PER CASE
$34.50 / CASE
IN STOCK Professional-grade 20x24x4 expansion poly mailers built for e-commerce brands shipping books, binders, and catalogs. Features self-seal closure with tear strip, puncture-resistant 2.5 mil polyethylene, and gusseted design for thicker items. Sold by the case of 100.
Envelopes & Mailers

20x24x4 2.5 Mil White Self-Seal Poly Mailers 100/Case

PN: EPM20244

20 x 24 x 4 in 2.5 Mil Polyethylene 100 PER CASE
$59.96 / CASE
IN STOCK Professional-grade white corrugated literature mailers in 14.25
Boxes - Mailers

14.25x11.25x4 White Corrugated Literature Mailers 50-Pack

PN: M14114

14 1/4 x 11.25 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$104.82 / BUNDLE
IN STOCK 10x13
Envelopes & Mailers

10x13 2.5 Mil Clear Self-Seal Poly Mailers 100/Case

PN: CV1013100PK

10 x 13 in 2.5 Mil Polyethylene 100 PER CASE
$25.97 / CASE
IN STOCK Professional white corrugated literature mailer sized 11
Boxes - Mailers

11x11x4 White Self-Seal Corrugated Literature Mailers 25-Pack

PN: ML11114

11 x 11 x 4 in ECT-32-B Corrugated 25 PER BUNDLE
$85.98 / BUNDLE
IN STOCK Ship small items with confidence using these 24x2x2 ECT-32-B white corrugated mailers. One-piece fold-and-tuck design eliminates tape and glue while delivering double-wall crush resistance. Bundle of 50 saves money on per-unit costs and freight efficiency.
Boxes - Mailers

24x2x2 ECT-32-B White Corrugated Mailers 50/Bundle

PN: M2422

24 x 2 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$61.52 / BUNDLE
IN STOCK 10x8x6 ECT-32-B White Corrugated Mailers, 50-Pack
Boxes - Mailers

10x8x6 ECT-32 White Corrugated Mailers 50-Pack

PN: M1086

10 x 8 x 6 in ECT-32-B Corrugated 50 PER BUNDLE
$101.78 / BUNDLE
IN STOCK Professional kraft corrugated literature mailers that assemble in seconds without tape, glue, or staples. Made from strong ECT-32-B material for crush-resistant protection. Perfect for e-commerce brands shipping documents, catalogs, and marketing materials with impact. 50 mailers per bundle.
Boxes - Mailers

12 1/8 x 9 1/4 x 2 in Kraft Literature Mailers Self-Seal 50/Bundle

PN: M1292K

12 1/8 x 9 1/4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$53.17 / BUNDLE
IN STOCK Save 30% on storage and shipping costs with these ECT-32-B kraft corrugated mailers. The one-piece fold-and-tuck design eliminates assembly time while dual-wall construction protects fragile items. Ships flat in 50-count bundles for maximum warehouse efficiency.
Boxes - Mailers

7x5x2 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M752K

7 x 5 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$51.65 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B kraft corrugated mailers. One-piece fold-to-close design requires no tape, glue, or staples–assemble in seconds and cut labor costs. Double-wall construction on front and sides provides superior crush resistance while staying lightweight to reduce postage.
Boxes - Mailers

5x5x5 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M555K

5 x 5 x 5 in ECT-32-B Corrugated 50 PER BUNDLE
$60.00 / BUNDLE
IN STOCK Professional 14
Boxes - Mailers

14x10x4 Kraft Corrugated Literature Mailers 50/Bundle

PN: MFL14104K

14 x 10 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$132.92 / BUNDLE
IN STOCK Professional-grade ECT-32-B corrugated carrying cases engineered for warehouse and fulfillment operations. Pre-assembled with integrated plastic handles, these 20
Boxes - Mailers

20 x 11 3/8 x 5 1/2 in White Corrugated Carrying Cases with Handles 10/Bundle

PN: MCC5

20 x 11 3/8 x 5 1/2 in ECT-32-B Corrugated 10 PER BUNDLE
$61.37 / 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 needs, send support the details before placing a large order.

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 calculator -> Contact support for larger orders -> Compare corrugated box types -> View products below ->