US Women:5.5-6.5/Men:5-5.5M = Insole Length 8.46in = EU 36-37
US Women:7.5-8.5/Men:6-7 = Insole Length 9.17in = EU 38-39
US Women:9.5-10.5/Men:7.5-8.5 = Insole Length 9.69in = EU 40-41
US Women:11-12/Men:9.5-10.5 = Insole Length 10.20in = EU 42-43
US Women:12.5-13/Men:11-11.5 = Insole Length 10.71in = EU 44-45
Recommended 1: CONVENIENCE - Smooth neck design prevents chafing when wearing our water shoes. It is convenient to wear and take off.
Recommended 2: COMFORTABLE FIT -- Breathable and smooth fabrics with fine stretch on uppers. Like socks, flexible and comfortable.
Recommended 3: RUBBER OUTSOLE & FOOT SAFETY -- Wearable and top-quality rubber sole, which protects your feet from being hurt by sharp objects.
Recommended 4: OCCASION - Yoga Training, beach, swimming, pool, weight training, wake-boarding, sailing, boating, kayaking, windsurfing, cycling, jogging, walking, fishing, beach volleyball, gardening, lawn, car-washing and driving. Family outings!