【How-to】What size is 150 - Howto.org

Toddlers’ sizes run from 0–13: The smallest sizes in this range are tiny baby shoes, but the larger sizes often fit kids who are 4 or 5 years old or even older. Important: These shoes are often marked with “T” for toddler up to size 7 (e.g., 4T, 5T, 6T, 7T).