You'll usually find them in sizes like 7 inches long with a 3/4 inch blade, 8 inches with a 7/8 inch blade, or 8 1/2 inches with a 5/8 inch blade. The smaller widths work well for tiny patients like newborns and toddlers, while longer handles give surgeons better reach in bigger kids. Surgeon choose based on the child's size and what part of the body they're working on.