S/M fit for men US shoes 6-9.5, women US shoes 8-12. L/XL fit for men US shoes 7-10.5-14, women US shoes 9-13.5. Machine Wash ❤️High Quality: We do our best to choose high quality ultra nylon and elastic fibers of our compression socks to provide most premium comfort and support. The seamless toe and the cushion all of the sole will not have no more blisters. Great quality, light weight and soft touch are our confidence to provide you perfect compression socks. It is ideal choice for people who sit or stand for a long period during travel or at work. ❤️Alleviates Pain Resulting From Edema, Varicose veins and Shin splints; Improves poor blood-circulation by providing the right amount of varied compression-levels on Heel, Foot and Calves; Relieves leg pain and helps to reduce building-up of lactic acid. ❤️Give Your Best Support: Professional compression stockings are suitable for everyone. Progressive and therapeutic pressure design; strong compression at the ankle and gradually decreasing compression near the calf. Best support for runners, athletes, nurses, fitness training, basketball, hiking, cycling, or those physical workers who require standing up all the time. ❤️ZSZBACE provides best customer service, Order now and find the different on your feet. you will 100% satisfied with our socks! If you have any problem in size, please contact us and we will refund you, or if you have any quality problem, we will send a replacement to you. We only want to give you a best service!