M: 6-9. W: 7-10. New! Easy on, easy off technology. Great for travel! Anti-odor. Graduated compression. Increase circulation. Compression Socks: Sizing Guide: Men's: small/medium (6-9); large/x-large (9-12). Women's: small/medium (7-10); large/x-large (10-13). Arch = relief you need. Ankle = support you want. Fully cushioned footbed for all day comfort. Energizing support for your arch, feet and calves. Improves foot and leg comfort, performance, and recovery. Reduces pain & swelling from prolonged sitting or standing. Copper infused. Anti-odor. Graduated compression. Increases circulation. Please see instruction card inside package. Made in China.