Polyester. Fabric has no stretchTumble dryPolyester. Fabric has no stretch.XS — US( 0), S — US( 0-2 ), M — US( 4 ), L — US( 8 ), XL — US( 12 ), XXL — US( 14 ), XXXL — US( 16 ). XXXXL — US( 18 ). Please refer to sizes in Product Description as below, if you like loose style, please choose 1 size up.Feature: Plain, Round Neck, Cute, Pleated, Elegant, Regular Fit, Button, Cap Sleeve, Asymmetrical, Petal Sleeve, Curved Hem.Suitable for Summer, Vacation, Casual Outtings, Office, School, Home and Daily wear.Care: Hand wash with cold water. Do not bleach or tumble dry warm.