Cheer Mom Lets Go Rhinestone Glitter V Short Sleeve Tee Shirt Size Small fits size 0-4 - chest size 30-34, Medium fits size 6-8- chest size 34-36, Large fits size 10-12 - chest size 36-38, XL fits size 14-16 - chest size 38-42, XXL fits size 18-20 - chest size 42-44. .