Size - S=US 4-6, M=US 8-10, L=US 12-14, XL=16-18, XXL=20-22.see details in ruch description. Features - This Hollow Out Cover Up design round neck，mini dress length，long sleeve，knit crochet swimsuit，sheer beach cover up.Occasion - This beach dress cover up perfect for wearing at beach, swimming pool, poolside tanning salon, and Water Park. It is also the good choice for honeymoon gift.Fabric - this beach cover up made of 100% acrylic.Soft and comfortable.Wash - Hand wash recommend. Machine wash. Air dry. Do not use dryer.