Konikit Unisex Quick-Dry Water Shoes Aqua Socks Barefoot Shoes for Pool Beach Yoga Exercise Surf Swim Water Sport. A perfect shoes for your summer outdoor water activities . Product Features: - Well made with high quality and not budging on damage or tearing. - Comfortable fit, Breathable and smooth fabrics with fine stretch on uppers. Like socks, flexible and comfortable. - Rubber sole and foot safety. Wearable and top-quality rubber sole, which protects your feet from being hurt by sharp objects. - Suitable for water park, water class, cruise, hanging out, aqua zumba, aqua therapy, water park employees, waterfall hikes, etc. Take our shoes when you go to vacation. Size Chart: S: US Women: 5-6/Men:4.5-5 = Insole Length 8.46in = EU 36-37 M: US Women: 7-8/Men:6-7 = Insole Length 9.17in = EU 38-39 L: US Women: 9-10/Men:8-8.5 = Insole Length 9.69in = EU 40-41 XL: US Women: 10.5-11.5/Men:9-9.5 = Insole Length 10.20in = EU 42-43 XXL: US Women: 12.5-13.5/Men:10-10.5 = Insole Length 10.71in = EU 44-45 XXXL: US Men: 11.5-12.5 = Insole Length 11.22in = EU 46-47 How to measure our feet? - From the longest toe to heel - Please stand on a pair of paper and mark where your toe and heel are. Then, measure the length from your toe to heel and find the most suitable size of your feet according to our size chart. Note: it is suggested to choose the larger size if the length of your feet is between two values in the size chart.