COSSIE+CO sizing is very simple - swimsuits are sized 1 to 4. Below is a conversion chart with comparable sizing. Not all styles are available in all sizes. If you have any questions feel free to email us on help@cossieandco.com
1 2 3 4
INT S M L XL
UK 8 10 12 14
EU 36 38 40 42
US 4 6 8 10
AU 8 10 12 14
 
Those with a fuller bust or long torso may wish to take one size up.