Motif Medical Gradient Maternity Compression Socks SizeMedium 20-30mmHg Compress. 2 pairs Black White/Grey Features: Gradient-Controlled Pressure Helps prevent swelling, discomfort, and varicose veins Easy to Put On Non-Restrictive Made in the USA Motif Gradient Compression Socks are designed to expand with you during pregnancy and prevent swelling, circulation issues and varicose veins. They can reduce discomfort in your feet and ankles, support your cardiovascular system by promoting good blood flow, and help you stay more comfortable when you’re on your feet for long periods of time. Be sure to refer to the Motif size guide below to find your correct fit and receive the right amount of pressure. Made for pregnancy 3-9 months.