My daughter found them a bit tight and the heel hurt her achilles tendon. We were able to fix this with a self-adhesive heel pad, but they were firmer after that. Please take this into account when dimensioning. The arch support isn't great in my opinion, but the straps are lower on the foot - they don't go through the thickest part of the foot, but go a little lower, closer to the toes. This allows you to make the step more comfortable. Daughter loves how they look with the double strap.
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