Poly mailer sizes and mil, in plain numbers.
US buyers order in inches and mil; our factory works in millimeters and microns. Convert either way here, then send us the spec.
Inches ↔ millimeters
Mil ↔ micron
1 mil = 25.4 µm = 100 gauge.
Standard US poly mailer sizes
| Inches (W × L) | Millimeters | Typical use |
|---|---|---|
| 6 × 9 in | 152 × 229 mm | Jewelry, accessories |
| 7.5 × 10.5 in | 191 × 267 mm | Cosmetics, socks |
| 9 × 12 in | 229 × 305 mm | Documents, books |
| 10 × 13 in | 254 × 330 mm | T-shirts, leggings |
| 12 × 15.5 in | 305 × 394 mm | Hoodies, jeans |
| 14.5 × 19 in | 368 × 483 mm | Jackets, multi-item |
| 19 × 24 in | 483 × 610 mm | Bulky apparel |
| 24 × 24 in | 610 × 610 mm | Bedding, pillows |
| 28 × 40 in | 711 × 1016 mm | Comforters |
Width × length, excluding the flap. Standard range 3 × 4 in to 31 × 43 in; other sizes on request.
Which mil?
| Mil | Micron | Gauge | Best for |
|---|---|---|---|
| 1.5 mil | 38 µm | 150 gauge | Light, soft items |
| 2.0 mil | 51 µm | 200 gauge | Accessories, small apparel |
| 2.5 mil | 64 µm | 250 gauge | Most apparel, the e-commerce standard |
| 3.0 mil | 76 µm | 300 gauge | Heavier apparel, boxed items |
| 4.0 mil | 102 µm | 400 gauge | Heavy-duty, sharp corners, bulky items |
Not sure? We put two or three thicknesses in your free sample kit so you can test them.
Send us your spec
We reply within one business day with sizes, mil and a delivered price.
- Free sample kit shipped to your US address
- Delivered prices, DAP to your door
- Orders from one pallet, mixed sizes welcome
- Plain, printed with your brand, or fully neutral
- Meet in person in January–February 2027
Prefer email? sales@kargopekusa.com