These EVA foam pads offer many solutions for horses with severe hoof conditions such as founder and navicular problems. They provide comfort and support when used with the Boa, Bare, Easyboot Epic and Easysoaker Boot. 12mm. Easyboots, Easyboot Epic and Bare sizing: S (fits pony-2), L (fits 3-7)Boa Boot sizing: S (fits size 00-2, L (fits 3-7)