Whether you're jetting around town or jet-setting around the world, these Celeste Stein compression socks are guaranteed to promote proper blood flow. Keep your feet lookin' cool and feelin' cozy! FEATURES  Nylon 8-15 mmHg Compression Strength PRODUCT DETAILS  Sock Type: Mid-Calf Sock Fitting: 8-15 mmHg Mild Regular calf fits women's shoe sizes 5-11 and up to a 17" calf8-15 mmHg Mild Wide calf fits women's shoe sizes 5-11 and up to a 24" calf15-20 mmHg Moderate Regular calf fits women's shoe sizes 5-11 and up to a 15" calf15-20 mmHg Moderate Wide calf fits women's shoe sizes 5-11 and up to a 21" calf20-30 mmHg Firm Regular calf fits women's shoe sizes 5-11 and up to 15" calf20-30 mmHg Firm Wide calf fits women's shoe sizes 5-11 and up to a 21" calf