1. Take exact measurements using soft tape measure.
2. Measure bust, waist, and hips using our guide.
3. If you are in between sizes, we recommend choosing the bigger size for best fit or checking the details on each product page for specific details.

Please note that this is a general guide to sizing and the measurements provided are to give you an approximate idea of what size you will be in OCEANCHILD bikinis and swimsuits. If you are unsure which size to choose, please send an email to before purchasing.



Measure around your chest at the fullest point of bust with no bra on. Make sure measuring tape is relaxed and not tight. Relax your arms at either side and keep the measuring tape parallel to the floor.


Measure around the smallest part of your waist. Keep tape parallel to the floor and ensure one finger fits in between your body and the tape for a more comfortable fit.


Measure around the widest part of your lower hips and bottom, often this is the upper thigh area. Do not measure around your hip bones, this is too high. Keep tape parallel to the floor.


 Size Bust Size (in cm) Cup Size
XS 82-89 A
S 89-96 A-B
M 96-102 B-C
L 102-110 C-D
XL 110-118 D



 Size Waist (in cm) Hips (in cm)
XS 60-68 84-92
S 68-76 92-100
M 76-84 100-108
L 84-92 108-116
XL 92-100 116-124



 Size Bust (in cm) Waist (in cm) Hips (in cm)
XS 82-89 60-68 84-92
S 89-96 68-76 92-100
M 96-102 76-84 100-108
L 102-110 84-92 108-116
XL 110-118 92-100 116-124


Please note that it always depends on whether you like it more cheeky or prefer more coverage.
Need more help? If you have a specific sizing or style question, please email us