The calves in these boots are TIGHT! My daughter has the size 2 but they are getting too small, so I ordered the 3s. The calves in those were smaller than the 2s and she couldn't even get them on, so I ordered the 4s. Those fit ok but the boots are too tall for her and dig in to the back of her knee. I am really tired of paying return shipping on these! If I return the 4s, I'll have paid as much in shipping back and forth as the blooming' boots cost!