Aidyn has had 2 pairs of Robeez, and they have lasted the distance. His current pair are sized for 18-24 months I believe, but they still fit him fine, and have a few more months in left in them (and he has big feet for his age too!) - I think maybe they have stretched over time? But great value for money.. he wears them to daycare, and to the creche at the gym.