Fits true to size – Take your normal size.  Model is 175cm/5ft 9in and is wearing size S. Brand size conversion: XS = UK6-8, S = UK8-10, M = UK12-14, L = UK16-18, XL = UK20-22, XXL = UK22-24, XXXL = UK26-28 Four way stretch, shaping fabric, high waist, straight leg, back welt pockets. Composition and Care: Main: 68% rayon, 28% nylon, 4% elastane. Lining: 80% polyester, 20% elastane. Machine wash. Colour: Classic Black SPANX The Perfect Straight Leg Trousers - Classic Black