All of our swimsuits are true to size. This means you should follow your normal sizing. The best guide is your underwear, what you would wear in a bra is the size you would order from us. For example in you were a 18E bra you are a 18 in our swimsuits.
If you are between sizes say a 18E bra and a 20 underpants, we recommend going up to the larger of the two sizes, so a size 20 in this case.
Any issues, Curvy Swimwear is happy to help you find the right swimsuit for you!