My daughter was about a 9.5 when I bought these in a 10. She had trouble walking in them bc of the sizing but eventually her feet grew into them/ thick socks helped. We had a very cold winter this year so these shoes were perfect! Super warm inside as well as thick and have good bottoms on them. Only downside is that they're pretty low cut so luckily we didn't have huge piles of snow. Other than that, a great buy!