There is a size chart & additional information listed in each product.
Capri is 2 years old and currently wearing size 12-18M.
Sivan is 5'3" tall, weighs 115 pounds, is 24/25 in jeans, and a 34B. She wears a SMALL in all swim & sport pieces.
Most items run true to size. If you are in between sizes we recommend sizing up.