FiveFingers are designed around the foot's measurement in inches. There is no real 100% translation between your US size and FiveFingers size. In order to find the right size, please measure both feet from heel to tip of longest toe with a ruler in inches. Take the longest measurement for your longest foot and refer to our women's size chart or men's size chart .Please click here for a video about how Vibram shoes should fit.Looking to be closer to nature? Get the minimal feel you crave by slipping into the KSO EVO from Vibram FiveFinger®.Built to provide the best ground feedback.Polyester mesh and textile upper materials. Bungee speed lacing system allows for easy on and off, and a snug fit. Soft lining offers a great next-to-skin feel. Lightly padded, 2 mm EVA insole features antimicrobial properties for a fresher in-shoe fee.Max Outsole Thickness: 4.7 mmVibram® outsole delivers reliable traction over a variety of surfaces. Imported. Measurements: Weight: 4 ozProduct measurements were taken using size 38 (US Men's 7.5-8), width D - Medium. Please note that measurements may vary by size.