I bought 2 pairs in this style, one for my son, one for my daughter.

I bought what I thought would be a size ahead for my son. Because they run rather small, specifically the opening to insert the foot, he is wearing them now, and I'm needing to return the ones I bought for my daughter because she cannot fit her foot into them comfortably.

I don't think it's a foot width issue, it's more a tight opening design. The material and workmanship are good and they're cute, I wish we could keep hers.