First thing’s first: understand the size conversion. Women’s sizing runs 1.5 sizes larger than youth sizing. So to determine your youth size, simply subtract 1.5 from your regular size. For example, if you wear a women’s 7.5, you would wear a youth 6. Youth sizes run as large as a 7, so anything up to an 8.5 falls within the women’s/kid’s overlap. Note: Youth sizes are also equal to men’s sizes, so a youth 7 would also fit a men’s 7. 

Formula: (your shoe size) – 1.5 = your youth size