SIZE GUIDE: S/M: Ankle Circumference: 8½-10".Calf Circumference: Up to 16½" .Length of stocking laying flat: 15.7" L/XL: Ankle Cir: 11½-13".Calf Cir: Up to 19" .Length of stocking laying flat: 16.9" SIMPLE TO GET ON AND OFF - Just slide over your foot and ZIp Up. High Quality Medical Stockings Material Won’t Lose its Compression. Quality No-Snag Zips with Skin Protector. Hose Stays Zippered All Day Long. Best Long term relief. Toeless for comfort. RELIEVE Common Leg Problems Such as Varicose Veins, Swelling Muscle Pain, Tired Legs, Spider Veins, Bad Circulation, Shin Splints, and Edema. Perfect for Nurses, Maternity, Pregnancy, Post-surgery, and Diabetic Use - Unisex - Zipper Compression Socks for Men and Women EXTRA COMFORT - provided by our ComfortZip which protects your sensitive skin from the Zipper. We recommend you never buy socks without this feature. IDEAL GIFTS - These compression stockings with zipper are unisex, great for blood circulation, and treatment of varicose and spider veins. Ideal gifts for people who stand for a long time like teachers, nurses or those who sit for a long time such as office workers, IT staff, students, etc. TOELESS & ZIPPER DESIGN - Size Large to 5X. Designed with strong high-quality zippers, our compression stockings for women are ultra-easy to put on and take off. Smooth & durable zippers stay snug and won't open. The open-toe style suits any foot size and looks stylish!