We use CM (centimeter) as the measurement ***NOT IN SIZE UK/US, because CM (centimeter) offers higher accuracy. Start measure from the tip of your longest toe till the back of your heel. ⭐️Measurement Guide⭐️ Size 36 = 23.0cm Size 37 = 23.5cm Size 38 = 24.0cm Size 39 = 24.5cm Size 40 = 25.0cm Size 41 = 25.5cm ⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐ ⚠️⚠️ Please note that due to limitations in photography and the inevitable differences in monitor settings, the colors shown in the photograph may not correspond 100% to those in the items themselves. ⚠️⚠️ If you have any problems with our product or service, please feel free to contact us before you leave a negative feedback, we are ready and will try our best to solve any problem. ⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐ Warranty & Return Policies No warranty. If you get factory fauty/broken item or wrong item/size/color, please contact us within 3 days start counting on the date you received, we will not taking any responsibility after 3 days passed. ⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐ Supports Chat Us on for more enquiries.