Here is the size chart for selecting the Watery Reptile Core wetsuit for women. The measurements are taken with the wetsuit laid flat and without stretch. The wetsuit will give and adjust to your body both during use and in the water, ensuring a perfect fit while swimming. Therefore, choose the size based on the measurements closest to yours.
If you happen to fall between two sizes, select the size where you match most of the measurements. Generally, the most important measurements are chest and height (ankle to shoulder).
A wetsuit should not fit too loosely. If there are many air pockets or "bags" around the suit, it's too large for you.