Size guide
What size do I choose?
Bum bikinis are designed to cover the essentials. We strive to make all our clothes adjustable so that they can adapt to different body types.
⚠️ However, please note that we do not follow a standard sizing system as our bikinis are small and low-rise. Therefore, when in doubt, we recommend sizing up.
ATOM 2.0 TOP
Your size will depend on how you like your bikinis to fit. If you prefer a top with minimal coverage, we recommend size S. If you want a bit more coverage, go for size M. Size L is best suited for larger busts.
| TALLA | Bra Size |
| S | AA & A cups B cup if you want very small coverage |
| M |
B cup |
| L | C & D cups |
These are the top's measurements:
ATOM 2.0 THONG
If you prefer a low-rise thong, go for size S. The back coverage is the same for both S and M, so if you’d like a bit more height in the front, choose size M.
| TALLA | Waist | Hips | Pant size (aprox) |
| S | 55-67 cm | 75-91 cm | 34-36 |
| M | 68-86 cm | 92-100 cm | 38-40 |
| L | 86+ | 100+ | 40+ |
ATOM TOP
General recommendations:
| SIZE | Bra Size |
| XS/S | A & B Cups |
| M/L | C, D + Cups |
However, you should choose your size according to how you want the bikini to look. If you have a B cup but you like to be more covered, we recommend size M/L, and if you have a C or D cup but want a bikini that covers very little, we recommend choosing size XS/S.
ATOM THONG
General recommendations:
| SIZE | Waist Measurements | Hip Measurements |
| XS/S | 55-67 cm | 75-91 cm |
| M/L | 68-86 cm | 92-100 cm |
Remember that the measurements are approximate, and that, in case of doubt, we recommend going up a size.
Visual size reference:
ATLAS TOP
General recommendations:
| SIZE | Bra Size |
| XS/S | A & B Cups |
| M/L | C, D + Cups |
Visual size reference:
If you need our recommendation to choose your size, contact us at hola@bumswim.com or via WhatsApp.