A great addition to your springautumn kit collection as you prepare to venture out on your favourite rides in wet weather size guide how to work out your size for socks amp overshoes to ensure you purchase the perfect fit please follow these simple steps measure the length of your foot heel to toe in using a tape measure the size that you measure in centimeters is your sock size if you measure 29cm you will need a medium size sock over sock or overshoe or a large in a liner sock