Find your swimwear size in this chart. Swimsuits and bikinis are usually quite flexible, and stretch along with about 1 to 2 cm/inches.
How to measure from top to bottom:
BUST | This is not your basic bra size. You should preferably measure with out a bra or an un-padded one. If possible, let someone help you with the measuring. Stand straight, relax your arm the sides, and pull the measuring tape across the fullest part of your breast.
WAIST | Stand straight up and find your natural waistline, this is the smallest part of your waist. Usually it’s about 1 inch above your belly button. Keep the measuring tape slightly loose around the waist, so you can have some breathing room.
HIP | Stand straight up and find the widest part of your hip. You can usually find it about 7 inches under your natural waistline. Put the measuring tape across both hipbones around your back and front. Leave it slightly loose, so that your little pinky fits in between.