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.
⚠️ Please note that we do not follow a standard sizing system as our bikinis are small and low-rise. 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 |
Visual size reference (tops):
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+ |
Visual size reference (thongs):
AURA TOP
For a regular fit, choose your size according to the chart.
For a minimal fit (less coverage), size down.
For more coverage, size up.
If you’re unsure or between sizes, we recommend sizing up.
General recommendation:
| SIZE | Bra Size |
| S | AA & A Cups |
| M | B Cups |
| L | C Cups |
| XL | D Cups |
Visual size reference (tops):
AURA THONG
This thong style is adjustable with side straps. We recommend choosing your size based on the size chart.
| SIZE | 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+ | 42+ |
Visual size reference (thongs):
If you need our recommendation to choose your size, contact us at hola@bumswim.com or via WhatsApp.