Here is the size chart for choosing the Watery Gecko wetsuit for children. The measurements are taken with the wetsuit laid flat and unstretched. The wetsuit will adjust both with use and in water, adapting to the body while swimming.
If you find yourself between two sizes, choose the one where you match most of the measurements. Generally, the most important measurements are chest and height (ankle to shoulder).
A wetsuit should not be too loose. If many air pockets or "bags" form around the suit, it is too large for you.
