Skate size and shoe size run different. This is a major contributor to players getting the wrong sized skate for their feet. For senior skates, your skate size, generally speaking, is 1.5 sizes smaller than your shoe size. For example, a person who wears a size 10.5 shoe would be looking for a skate around size 9. A shoe size of 8 would be looking for a size 6.5, etc. For JR skates, your skate size, again, generally speaking, is 1.0 sizes smaller. This can vary between various skate and shoe models and is strictly a general guideline.