These training fins are available in a range of sizes from UK 12.5 -1 (Kids) up to UK 10.5 -11. A quality product from Swimz, made from 100% silicone - a light weight fin with super soft comfy fit suitable for regular use. Promotes ankle flexibility and aids the development of a correct kicking action. Short blade design ideal for swim training. Ideal for club use as these are colour coded by size making them easy to pair up.