Jobst for Men Casual 15-20, 20-30, 30-40 mmHg Compression Socks Features: Contemporary, relaxed design that delivers gradient compression therapy, yet can be worn all day. Reinforced heel resists shoe abrasion and strong yarns resist wear and tear. All-Day Comfort Knee Band keeps socks up without binding or pinching. Anti-microbial/Anti-fungal Finish promotes healthy foot care and prevents odors. Circumference measurements of the Ankle and Calf will determine correct size, see chart below for finding the best fit. Available Colors: Black, Navy, Khaki. Available Sizes: Small, Medium, Large, X-Large, Medium-Tall, Large-Tall, Large-Full Calf, X-Large-Full Calf (Medium-Tall and Large-Tall available only in Black or Khaki).