My daughter is 15 months old and she wears a 5T i want to buy her nike shoes but dont understand the sizes?

Try going to a Nike store or a foot locker. Take her with you and try some shoes on you want her to wear to know what size she fits the best. Make sure you get her like a size bigger than what she can fit so the shoes can last her.

When I was little my mom used to buy me like 3 or 4 different pairs of sneakers, but each sneaker would be a size bigger than each one so she wouldn't keep taking me back forth to a shoe store when i grown out of a shoe.

GOD LUCK! :)

I would go into the store where they have the scales that measure what size your daughter is.

My daughter wears a size 4 right now and she is 17 mos, but will be a 5 by the time winter comes.