These panties WORK! Perfect amount of compression to flatten the belly and make you look snatched while still allowing you to breath 😉 My favorite part is that they don't ride up or roll down like a lot of shapewear I've tried. Approx Flat Lay Measurements: Small - 12" waist Medium - 12" 5cm waist Large - 13" 7cm waist 88% Polyamide, 12% Elastane