Black superflat mailing boxes
Black superflat mailing boxes are slim, rigid mailers with about 16mm of internal depth, for flat items that must not bend: cards, prints, vouchers and thin accessories, in a black finish. They fold together without tape. Choose 180 x 100mm, 152 x 132mm, 220 x 160mm or 310 x 220mm.
Black superflat boxes drawn to scale (length x width). Click a box to shop.
Black superflat sizes
| Box size (mm) | Code | Good for | Pack |
|---|---|---|---|
| 180 x 100 x 16 | B276 | Gift cards, vouchers, jewellery cards | 100 |
| 152 x 132 x 16 | B280 | Square cards, coasters, small prints | 100 |
| 220 x 160 x 16 | B278 | A5 prints, cards, flat accessories | see product |
| 310 x 220 x 16 (A4) | B279 | A4 documents, prints, calendars | 100 |
Sizes are internal dimensions. Going by post as a large letter? Check Australia Post’s current letter size and weight limits against the outside of the packed box.
Black superflat box FAQs ▾
Black superflat box FAQs
How deep is a superflat box?
About 16mm of internal depth, enough for cards, prints and thin accessories.
Can I post a superflat box as a large letter?
Often, yes. Measure the outside of your packed box and weigh it, then check the current Australia Post letter limits before you post.
Which superflat box fits A4?
The 310 x 220 x 16mm black superflat box fits A4 documents and prints.
Do superflat boxes need tape?
Not to assemble. Add a seal sticker for security if you like.
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