VfEmage Women's Belted Optical Illusion Slim Pencil Dress Zipper closure Our size is one size smaller than that of the US local brands like "Nordstrom". To prevent the size issue, please refer to our detail size information (bust/waist/hip size) below the product description before order. Thanks! The Blue/Green/Gray Part Material: 90%Polyester+10%Spandex The Black Part Material: 75%Cotton+20%Nylon+5%Spandex Garment Care: Machine Washable Thickness: regular, suitable for spring and summer