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 Protect small shipments with our ECT-32-B kraft corrugated mailers–double-wall crush-resistant construction in a one-piece folding design. 7x5x5" dimensions, 50-pack bundle ships flat to maximize warehouse efficiency and reduce postage expense on every order.
Boxes - Mailers

7x5x5 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M755K

7 x 5 x 5 in ECT-32-B Corrugated 50 PER BUNDLE
$51.42 / BUNDLE
IN STOCK ECT-32-B kraft corrugated mailers engineered for small package protection and postage savings. One-piece fold-and-tuck design with double-wall crush resistance assembles in seconds–no tape, glue, or staples required. Bundle of 50 ships and stores flat.
Boxes - Mailers

7x5x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M754K

7 x 5 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$62.28 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32 kraft corrugated mailers. Pre-scored one-piece design folds in seconds with no tape, glue, or staples–delivering double-wall crush protection on front and sides. All 50 mailers per bundle ship and store flat to maximize warehouse efficiency and reduce freight costs.
Boxes - Mailers

7x5x3 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M753K

7 x 5 x 3 in ECT-32 Single Wall Corrugated 50 PER BUNDLE
$58.49 / BUNDLE
IN STOCK ECT-32-B kraft corrugated mailers built for durability and efficiency. One-piece fold-and-tuck design with double-wall protection on front and sides–no tape, glue, or staples required. Ships and stores flat to maximize warehouse space and reduce freight costs. Bundle of 50 mailers.
Boxes - Mailers

7x4x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M744K

7 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$56.21 / BUNDLE
IN STOCK Heavy-duty 7x4x3 kraft corrugated mailers with ECT-32-B strength deliver crush-resistant protection without tape, glue, or staples. One-piece fold-and-tuck design assembles in seconds and ships flat to maximize warehouse storage. Bundle of 50 mailers reduces per-unit cost and freight volume.
Boxes - Mailers

7x4x3 ECT-32-B Kraft Corrugated Mailers 50/Case

PN: M743K

7 x 4 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$44.81 / BUNDLE
IN STOCK Reduce shipping costs and storage space with 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 small items, tools, and fragile products. Ships flat in bundles of 50.
Boxes - Mailers

7x4x2 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M742K

7 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$37.22 / BUNDLE
IN STOCK Ship small, fragile 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 with zero assembly required. Bundle of 50 ships and stores flat–maximize warehouse efficiency and reduce freight costs.
Boxes - Mailers

7x3x3 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: M733K

7 x 3 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$34.18 / BUNDLE
IN STOCK Lightweight ECT-32-B kraft corrugated mailers designed for small parcels, tools, and fragile items. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly takes seconds. Ships and stores flat, reducing warehouse footprint and freight costs by up to 40%.
Boxes - Mailers

7x3x2 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M732K

7 x 3 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$29.06 / BUNDLE
IN STOCK Lightweight ECT-32 kraft corrugated mailers engineered for maximum crush resistance and postage savings. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly takes seconds. Ships and stores flat to reduce warehouse footprint.
Boxes - Mailers

6.5x4.9x3.75 ECT-32 Kraft Corrugated Mailers 50/Bundle

PN: MLR4K

6 1/2 x 4.9 x 3 3/4 in ECT-32-B Corrugated 50 PER BUNDLE
$40.24 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B kraft corrugated mailers featuring crush-resistant double-wall construction. One-piece fold-and-tuck design assembles in seconds without tape, glue, or staples–reducing assembly labor and shipping weight. Bundle of 50 ships flat to maximize warehouse storage efficiency.
Boxes - Mailers

6.5x4.9x2.6 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: MRX6XK

6 1/2 x 4.9 x 2.6 in ECT-32-B Corrugated 50 PER BUNDLE
$33.53 / BUNDLE
IN STOCK Lightweight ECT-32-B kraft corrugated mailers designed for small, fragile shipments. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly in seconds. Ships and stores flat to maximize warehouse efficiency. 50-pack bundle.
Boxes - Mailers

6.5x4.5x2.5 ECT-32 Kraft Corrugated Mailers 50-Pack

PN: MRX5XK

6 1/2 x 4.5 x 2 1/2 in ECT-32-B Corrugated 50 PER BUNDLE
$51.42 / BUNDLE
IN STOCK Lightweight ECT-32-B kraft corrugated mailers with double-wall protection on front and sides–perfect for small, fragile items. One-piece fold-and-tuck design requires no tape, glue, or staples. Bundle of 50 ships and stores flat to maximize warehouse efficiency.
Boxes - Mailers

6.5x3.25x1.25 ECT-32 Kraft Corrugated Mailers 50/Bundle

PN: MRX1XLK

6 1/2 x 3.25 x 1 1/4 in ECT-32-B Corrugated 50 PER BUNDLE
$33.53 / BUNDLE
IN STOCK Ship small items with confidence using these 6x6x4 kraft corrugated mailers constructed from durable ECT-32-B material. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly takes seconds. Bundle of 50 ships and stores flat, maximizing warehouse efficiency and reducing freight costs.
Boxes - Mailers

6x6x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M664K

6 x 6 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$74.52 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B kraft corrugated mailers. One-piece construction folds in seconds–no tape, glue, or staples required. Ships flat to maximize warehouse space and reduce freight costs per unit.
Boxes - Mailers

6x6x3 ECT-32-B Kraft Corrugated Mailers 50/Bundle

PN: M663K

6 x 6 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$64.56 / BUNDLE
IN STOCK Ship small, fragile items safely with these ECT-32-B kraft corrugated mailers featuring double-wall crush-resistant protection. One-piece fold design requires no tape, glue, or staples–assembly takes seconds. Bundle of 50 ships flat to maximize warehouse efficiency and minimize freight costs.
Boxes - Mailers

6x6x2 ECT-32-B Kraft Corrugated Mailers 50/Case

PN: M662K

6 x 6 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$58.49 / BUNDLE
IN STOCK Ship small items with confidence using our 5x5x5" ECT-32-B kraft corrugated mailers. These crush-resistant, one-piece mailers fold in seconds with no tape or glue required, and ship flat to maximize storage efficiency and reduce freight spend. 50-pack bundle.
Boxes - Mailers

5x5x5 ECT-32-B Kraft Corrugated Mailers 50-Pack

PN: M655K

5 x 5 x 5 in ECT-32-B Corrugated 50 PER BUNDLE
$54.69 / 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 ->