Mailer Boxes

SELECTION EXPERT ADVICE

Self-Locking vs Tape-Seal Mailer Formats
MORE INFO
Self-locking mailer boxes close without tape using interlocking tabs, which speeds up packing on high-volume lines and creates a cleaner, more professional appearance. Tape-sealed formats allow more flexibility in fill height and can handle slightly oversized contents that exceed the box depth without a visible gap at the closure.
Size Selection for Common Product Categories
MORE INFO
Literature mailers suit flat, rigid items like books, catalogs, and framed prints. Garment mailers handle folded clothing and accessories efficiently. Multimedia mailers are sized for CDs, DVDs, and gaming cartridges. Choosing the right format for your specific product eliminates wasted space and reduces the cushioning material needed to fill the gap.
Mailer Boxes for Branded DTC Packaging
MORE INFO
Branded mailer boxes with consistent dimensions create a repeatable unboxing experience that can be photographed, shared, and recognized as part of your brand identity. Standardizing on one or two mailer sizes across your product line simplifies procurement, reduces pack station training time, and lowers your per-unit packaging cost.

Need help choosing a mailer box?

Decide between a mailer box and a poly or bubble mailer

Use these buying guides to choose the right format for your product weight, protection level, and unboxing experience.

Mailers Guide → Poly vs bubble vs rigid mailers Mailer vs Box Selector → When a mailer is enough and when you need a box
Overview

644 corrugated mailer boxes from 4 to 30 inches: white and kraft literature mailers, self-seal tab-lock and ECT-32 styles in packs of 10, 25 and 50. Inside dimensions and board grade are listed on each box. 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

Buying path

Buy Mailer Boxes 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 ->
IN STOCK 8x3x3 ECT-32 Kraft Corrugated Mailers 50-Pack M833K - alias listing
Boxes - Mailers

8x3x3 ECT-32 Kraft Corrugated Mailers 50-Pack M833K

PN: M833K

8 x 3 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$42.47 / BUNDLE
IN STOCK 8x4x2 ECT-32 Kraft Corrugated Mailers 50-Pack M842K - alias listing
Boxes - Mailers

8x4x2 ECT-32 Kraft Corrugated Mailers 50-Pack M842K

PN: M842K

8 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$44.05 / BUNDLE
IN STOCK 8x3x2 ECT-32 Kraft Corrugated Mailers 50/Bundle M832K - alias listing
Boxes - Mailers

8x3x2 ECT-32 Kraft Corrugated Mailers 50/Bundle M832K

PN: M832K

8 x 3 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$32.66 / BUNDLE
IN STOCK 7x6x3 ECT-32 Kraft Corrugated Mailers 50/Bundle M763K - alias listing
Boxes - Mailers

7x6x3 ECT-32 Kraft Corrugated Mailers 50/Bundle M763K

PN: M763K

7 x 6 x 3 in ECT-32 Single Wall Corrugated 50 PER BUNDLE
$64.56 / BUNDLE
IN STOCK 7x5x5 ECT-32-B Kraft Corrugated Mailers 50-Pack M755K - alias listing
Boxes - Mailers

7x5x5 ECT-32-B Kraft Corrugated Mailers 50-Pack M755K

PN: M755K

7 x 5 x 5 in ECT-32-B Corrugated 50 PER BUNDLE
$51.42 / BUNDLE
IN STOCK 7x5x3 ECT-32 Kraft Corrugated Mailers 50-Pack M753K - alias listing
Boxes - Mailers

7x5x3 ECT-32 Kraft Corrugated Mailers 50-Pack M753K

PN: M753K

7 x 5 x 3 in ECT-32 Single Wall Corrugated 50 PER BUNDLE
$58.49 / BUNDLE
IN STOCK 7x5x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle M754K - alias listing
Boxes - Mailers

7x5x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle M754K

PN: M754K

7 x 5 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$62.28 / BUNDLE
IN STOCK 7x4x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle M744K - alias listing
Boxes - Mailers

7x4x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle M744K

PN: M744K

7 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$56.21 / BUNDLE
IN STOCK 7x3x3 ECT-32 Kraft Corrugated Mailers 50-Pack M733K - alias listing
Boxes - Mailers

7x3x3 ECT-32 Kraft Corrugated Mailers 50-Pack M733K

PN: M733K

7 x 3 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$34.18 / BUNDLE
IN STOCK 7x4x2 ECT-32-B Kraft Corrugated Mailers 50-Pack M742K - alias listing
Boxes - Mailers

7x4x2 ECT-32-B Kraft Corrugated Mailers 50-Pack M742K

PN: M742K

7 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$37.22 / BUNDLE
IN STOCK 6.5x4.9x2.6 ECT-32 Kraft Corrugated Mailers 50-Pack MRX6XK - alias listing
Boxes - Mailers

6.5x4.9x2.6 ECT-32 Kraft Corrugated Mailers 50-Pack MRX6XK

PN: MRX6XK

6 1/2 x 4.9 x 2.6 in ECT-32-B Corrugated 50 PER BUNDLE
$33.53 / BUNDLE
IN STOCK 7x3x2 ECT-32-B Kraft Corrugated Mailers 50-Pack M732K - alias listing
Boxes - Mailers

7x3x2 ECT-32-B Kraft Corrugated Mailers 50-Pack M732K

PN: M732K

7 x 3 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$29.06 / BUNDLE
IN STOCK 6.5x4.5x2.5 ECT-32 Kraft Corrugated Mailers 50-Pack MRX5XK - alias listing
Boxes - Mailers

6.5x4.5x2.5 ECT-32 Kraft Corrugated Mailers 50-Pack MRX5XK

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 6.5x3.25x1.25 ECT-32 Kraft Corrugated Mailers 50/Bundle MRX1XLK - alias listing
Boxes - Mailers

6.5x3.25x1.25 ECT-32 Kraft Corrugated Mailers 50/Bundle MRX1XLK

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 6x6x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle M664K - alias listing
Boxes - Mailers

6x6x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle M664K

PN: M664K

6 x 6 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$74.52 / BUNDLE
IN STOCK 6x6x3 ECT-32-B Kraft Corrugated Mailers 50/Bundle M663K - alias listing
Boxes - Mailers

6x6x3 ECT-32-B Kraft Corrugated Mailers 50/Bundle M663K

PN: M663K

6 x 6 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$64.56 / BUNDLE
IN STOCK 6x6x2 ECT-32-B Kraft Corrugated Mailers 50/Case M662K - alias listing
Boxes - Mailers

6x6x2 ECT-32-B Kraft Corrugated Mailers 50/Case M662K

PN: M662K

6 x 6 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$58.49 / BUNDLE
IN STOCK 5x5x5 ECT-32-B Kraft Corrugated Mailers 50-Pack M655K - alias listing
Boxes - Mailers

5x5x5 ECT-32-B Kraft Corrugated Mailers 50-Pack M655K

PN: M655K

5 x 5 x 5 in ECT-32-B Corrugated 50 PER BUNDLE
$54.69 / BUNDLE
IN STOCK 6x5x3 ECT-32 Kraft Corrugated Mailers 50/Bundle M653K - alias listing
Boxes - Mailers

6x5x3 ECT-32 Kraft Corrugated Mailers 50/Bundle M653K

PN: M653K

6 x 5 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$57.73 / BUNDLE
IN STOCK 6x5x4 ECT-32-B Kraft Corrugated Mailers 50-Pack M654K - alias listing
Boxes - Mailers

6x5x4 ECT-32-B Kraft Corrugated Mailers 50-Pack M654K

PN: M654K

6 x 5 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$64.95 / BUNDLE
IN STOCK 6x5x2 ECT-32-B Kraft Corrugated Mailers 50/Bundle M652K - alias listing
Boxes - Mailers

6x5x2 ECT-32-B Kraft Corrugated Mailers 50/Bundle M652K

PN: M652K

6 x 5 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$44.81 / BUNDLE
IN STOCK 6x4x3 ECT-32-B Kraft Corrugated Mailers 50-Pack M643K - alias listing
Boxes - Mailers

6x4x3 ECT-32-B Kraft Corrugated Mailers 50-Pack M643K

PN: M643K

6 x 4 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$39.50 / BUNDLE
IN STOCK 6x4x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle M644K - alias listing
Boxes - Mailers

6x4x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle M644K

PN: M644K

6 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$48.61 / BUNDLE
IN STOCK 6x4x2 ECT-32-B Kraft Corrugated Mailers 50/Bundle M642K - alias listing
Boxes - Mailers

6x4x2 ECT-32-B Kraft Corrugated Mailers 50/Bundle M642K

PN: M642K

6 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$34.94 / BUNDLE
IN STOCK 6x3x2 ECT-32 Kraft Corrugated Mailers 50-Pack M632K - alias listing
Boxes - Mailers

6x3x2 ECT-32 Kraft Corrugated Mailers 50-Pack M632K

PN: M632K

6 x 3 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$28.86 / BUNDLE
IN STOCK 5x5x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle M554K - alias listing
Boxes - Mailers

5x5x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle M554K

PN: M554K

5 x 5 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$53.17 / BUNDLE
IN STOCK 5x5x2 ECT-32 Kraft Corrugated Mailers 50-Pack M552K - alias listing
Boxes - Mailers

5x5x2 ECT-32 Kraft Corrugated Mailers 50-Pack M552K

PN: M552K

5 x 5 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$33.42 / BUNDLE
IN STOCK 5x4x3 ECT-32 Kraft Corrugated Mailers 50-Pack M543K - alias listing
Boxes - Mailers

5x4x3 ECT-32 Kraft Corrugated Mailers 50-Pack M543K

PN: M543K

5 x 4 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$37.22 / BUNDLE
IN STOCK 5x4x2 ECT-32-B Kraft One-Piece Corrugated Mailers 50/Bundle M542K - alias listing
Boxes - Mailers

5x4x2 ECT-32-B Kraft One-Piece Corrugated Mailers 50/Bundle M542K

PN: M542K

5 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$33.42 / BUNDLE
IN STOCK 5x3x3 ECT-32-B Kraft Corrugated Mailers 50-Pack M533K - alias listing
Boxes - Mailers

5x3x3 ECT-32-B Kraft Corrugated Mailers 50-Pack M533K

PN: M533K

5 x 3 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$31.90 / BUNDLE
IN STOCK 5x2x2 ECT-32 Kraft Corrugated Mailers 50/Bundle M522K - alias listing
Boxes - Mailers

5x2x2 ECT-32 Kraft Corrugated Mailers 50/Bundle M522K

PN: M522K

5 x 2 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$31.00 / BUNDLE
IN STOCK 4x4x4 ECT-32 Kraft Corrugated Mailers 50/Bundle M444K - alias listing
Boxes - Mailers

4x4x4 ECT-32 Kraft Corrugated Mailers 50/Bundle M444K

PN: M444K

4 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$42.47 / BUNDLE
IN STOCK 4x4x3 ECT-32 Kraft Corrugated Mailers 50-Pack M443K - alias listing
Boxes - Mailers

4x4x3 ECT-32 Kraft Corrugated Mailers 50-Pack M443K

PN: M443K

4 x 4 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$34.94 / BUNDLE
IN STOCK 4x4x2 ECT-32-B Kraft Corrugated Mailers 50-Pack M442K - alias listing
Boxes - Mailers

4x4x2 ECT-32-B Kraft Corrugated Mailers 50-Pack M442K

PN: M442K

4 x 4 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$31.90 / BUNDLE
IN STOCK 4x4x1 ECT-32-B Kraft Corrugated Mailers 50-Pack M441K - alias listing
Boxes - Mailers

4x4x1 ECT-32-B Kraft Corrugated Mailers 50-Pack M441K

PN: M441K

4 x 4 x 1 in ECT-32-B Corrugated 50 PER BUNDLE
$30.38 / BUNDLE
IN STOCK 4x3x2 ECT-32 Kraft Corrugated Mailers 50-Pack M432K - alias listing
Boxes - Mailers

4x3x2 ECT-32 Kraft Corrugated Mailers 50-Pack M432K

PN: M432K

4 x 3 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$22.79 / BUNDLE
IN STOCK 4x2x2 ECT-32-B Kraft Corrugated Mailers 50-Pack M422K - alias listing
Boxes - Mailers

4x2x2 ECT-32-B Kraft Corrugated Mailers 50-Pack M422K

PN: M422K

4 x 2 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$17.88 / BUNDLE
IN STOCK 3x3x2 ECT-32-B Kraft Corrugated Mailers 50-Pack M332K - alias listing
Boxes - Mailers

3x3x2 ECT-32-B Kraft Corrugated Mailers 50-Pack M332K

PN: M332K

3 x 3 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$22.03 / BUNDLE
IN STOCK 38x26x1 ECT-32-B White Jumbo Corrugated Fold-Over Mailers 20/Bundle M38261 - alias listing
Boxes - Mailers

38x26x1 ECT-32-B White Jumbo Corrugated Fold-Over Mailers 20/Bundle M38261

PN: M38261

38 x 26 x 1 in ECT-32-B Corrugated 20 PER BUNDLE
$202.98 / BUNDLE
IN STOCK 36 x 24 x 1/4 in ECT-32-B White Corrugated Jumbo Fold-Over Mailers 20/Bundle M362414 - alias listing
Boxes - Mailers

36 x 24 x 1/4 in ECT-32-B White Corrugated Jumbo Fold-Over Mailers 20/Bundle M362414

PN: M362414

36 x 24 x 1/4 in ECT-32-B Corrugated 20 PER BUNDLE
$95.40 / BUNDLE
IN STOCK 30x22.5x1 ECT-32-B White Corrugated Fold-Over Mailers 20/Bundle M30221 - alias listing
Boxes - Mailers

30x22.5x1 ECT-32-B White Corrugated Fold-Over Mailers 20/Bundle M30221

PN: M30221

30 x 22.5 x 1 in ECT-32-B Corrugated 20 PER BUNDLE
$110.59 / BUNDLE
IN STOCK 28 x 22 x 1/4 in ECT-32-B White Corrugated Jumbo Fold-Over Mailers 20-Pack ML28221 - alias listing
Boxes - Mailers

28 x 22 x 1/4 in ECT-32-B White Corrugated Jumbo Fold-Over Mailers 20-Pack ML28221

PN: ML28221

28 x 22 x 1/4 in ECT-32-B Corrugated 20 PER BUNDLE
$102.39 / BUNDLE
IN STOCK 20x16x1 ECT-32 White Corrugated Mailers 20-Pack M20161 - alias listing
Boxes - Mailers

20x16x1 ECT-32 White Corrugated Mailers 20-Pack M20161

PN: M20161

20 x 16 x 1 in ECT-32-B Corrugated 20 PER BUNDLE
$48.00 / BUNDLE
IN STOCK 30x22.5 ECT-32-B White Corrugated Fold-Over Mailers 20/Bundle M302214 - alias listing
Boxes - Mailers

30x22.5 ECT-32-B White Corrugated Fold-Over Mailers 20/Bundle M302214

PN: M302214

30 x 22.5 x 1/4 in ECT-32-B Corrugated 20 PER BUNDLE
$104.82 / BUNDLE
IN STOCK 36x12x6 Kraft Multi-Depth Corrugated Jumbo Mailers 20/Bundle M36126 - alias listing
Boxes - Mailers

36x12x6 Kraft Multi-Depth Corrugated Jumbo Mailers 20/Bundle M36126

PN: M36126

36 x 12 x 6 in ECT-32-C Corrugated 20 PER BUNDLE
$108.79 / BUNDLE
IN STOCK 20 x 16 x 1/4 in ECT-32-B White Corrugated Fold-Over Mailers 20/Bundle M201614 - alias listing
Boxes - Mailers

20 x 16 x 1/4 in ECT-32-B White Corrugated Fold-Over Mailers 20/Bundle M201614

PN: M201614

20 x 16 x 1/4 in ECT-32-B Corrugated 20 PER BUNDLE
$79.58 / BUNDLE
IN STOCK 30x22x6 Kraft Multi-Depth Corrugated Jumbo Mailers 20/Bundle M30226 - alias listing
Boxes - Mailers

30x22x6 Kraft Multi-Depth Corrugated Jumbo Mailers 20/Bundle M30226

PN: M30226

30 x 22 x 6 in ECT-32-C Corrugated 20 PER BUNDLE
$144.32 / BUNDLE
IN STOCK 28x24x6 ECT-32 Kraft Multi-Depth Corrugated Jumbo Mailers 20/Bundle M28246 - alias listing
Boxes - Mailers

28x24x6 ECT-32 Kraft Multi-Depth Corrugated Jumbo Mailers 20/Bundle M28246

PN: M28246

28 x 24 x 6 in ECT-32-C Corrugated 20 PER BUNDLE
$153.13 / BUNDLE

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