It depends on which is your longest toe. Those who have a second toe that's longest will fit into a diff size than those with a big toe that's longer, bc if you look at the toe cap it's rounded. For example a person who's a size ten bc their big toe is the longest, is different than someone who fits a size ten because their second toe is the longest. The big toe will brush the toe cap in the area where it starts to curve. Second toe longest will brush the toe cap where it's leveled off at its longest distance from the heel. That's prob why there's some discrepancy where some ppl go down anywhere from 1.5-3 sizes in skates. It all has to do with which longest toe brushes which part of the toe cap vs in their shoes, and the tow box area of skates are quite diff than shoes.