EMU Australia Unisex Stinger Low Boot,Chestnut,Men's 4 M/Women's 5 M 100% Australian Sheepskin Rubber sole Shaft measures approximately 8 1/2" from arch Heel measures approximately 1" Platform measures approximately 3/4" Boot opening measures approximately 11 1/2" around Durable tapered hardwearing tpr rubber & quality eva for comfort & added support