Here is the size chart for selecting the Watery Calder Rapid wetsuit for women. Measurements are taken with the suit lying flat and unstretched. The wetsuit will expand with use and in water, adjusting to your body during swimming. So, choose your size based on the measurements you are closest to.
If you find yourself between two sizes, opt for the size that matches most of your measurements. Generally, the most important measurements are the chest and height (ankle to shoulder).
A wetsuit should not fit too loosely. If you notice many air pockets or “bags” forming around the suit, it is too large for you.