Premium satin fabric (100% Polyester). Fully lined. Please read the wash instructions. Model Measurements: Height 5'9", Bust 32", Waist 23.5", Hips 36" True to size. If you're between sizes, we recommend sizing up. Go braless or wear with nipple covers for added coverage. Stretch factor: 1/3 Bought it and never wear it because I have big hip and bum 😞 the dress is so beautiful fits amazing but in my case I was showing a lil my bum so I couldn’t wear it No stretchy! Size is UK 12 US 8 Is like a US MEDIUM