Mailer box sizes
A mailer box is the corrugated box that arrives at your door: one piece of board, a lid that tucks in at the front, and no tape or glue. Here are the sizes most shops start from.
Size chart by what ships
| For | Length × width × height | Inches | |
|---|---|---|---|
| Small accessories Jewellery, cables, a phone case |
150 × 100 × 50 mm | 5.9 × 3.9 × 2.0 | Make this dieline → |
| Cosmetics set A few bottles and jars |
200 × 150 × 80 mm | 7.9 × 5.9 × 3.1 | Make this dieline → |
| Apparel A folded T-shirt |
300 × 230 × 80 mm | 11.8 × 9.1 × 3.1 | Make this dieline → |
| Shoes One pair, in their own box or not |
350 × 300 × 130 mm | 13.8 × 11.8 × 5.1 | Make this dieline → |
| Subscription box A gift set or a monthly box |
305 × 230 × 100 mm | 12.0 × 9.1 × 3.9 | Make this dieline → |
Typical starting points, not a standard: every maker's stock sizes differ a little. These are the sizes of the space inside, so the finished box is a few millimetres bigger outside. Your printer will adapt them to your product.
How to measure
- Length and width — the floor of the box, crease to crease, the way box makers quote it. Add a few millimetres on each side of your product so it slides in and out.
- Height — the depth of the box with the lid closed. Soft goods like clothes squash; hard goods need the full height plus a little air.
Our sizes are crease to crease, so the floor of the box is exactly the length × width you type. The space inside is about one board thickness smaller.
Which board?
The default is E flute, 1.5 mm — thin, smooth to print and strong enough for most parcels. For heavy goods or a big box, pick B flute, 2.8 mm. Choose it in the Board list and the numbers adjust: the thickness doesn't move the size of the box, only the double walls, the lid and the flaps that have to make room for it.
The lid and the locks
The double side walls fold back inside the box and lock into slots in the floor with small tongues. The lid hinges on the back wall and its front flap tucks in at the front, with small ears that slip into the side walls. That is why a mailer closes without tape — and why it opens again for a return.
Shipping something heavy or bottle-shaped? Have a look at the crash lock bottom box sizes.