The new Entity Ergo is a tailor made binding system with a perfect fit to your foot. During a long developing process we realized, the most accurate way to measure feet for a Kiteboarding binding, is to measure the sole of your foot without toes. To find the best fitting size of your Entity Ergo, please measure from the top of the midfoot, between the 2nd and 3rd toe, till the end of the heel. As the perfect fit is very important for your kiteboarding experience, please follow this measurement advice and also check the graphic.