I purchased these to practice tap without making noise or scarring the floors. The old style had smooth suede bottoms but these have some traction on them. I decided to give them a try and they are working out fine for me, not as sticky as I had feared.

I wear a 6.5 and have an arch and the 6.5 size fit me perfectly.

I also have Capezio tap and ballet shoes in this size and they are holding up well to constant use.