Our tanks are true to size, so if you want it to be super tight, size down! The model in the photo shoot is wearing a small, and the model wearing the bra and bloomer set is wearing an XS. Here's a chart:
| US size | UK size | Buttercup size |
| 00 - 0 | 2 - 4 | XS |
| 2 - 4 | 6 - 8 | S |
| 6 - 8 | 10 - 12 | M |
| 10 - 12 | 14 - 16 | L |
| 14 - 16 | 18 - 20 | XL |