For the one piece, we recommend that you take the size of your bottom:

34, take XS
36, take S
38, take M
40, take L
42, take XL.
44, take XXL.

The one-piece 1.0 is more indented than that of the other one-pieces.

If you make a mistake, you have 14 days to change size. If you have any hesitation, contact us at We will be happy to help you and avoid round trips that could alter the planet.