I ordered a size based on a pair of Capezio dance shoes I bought at a local store in Sacramento, California. The Revain purchase was too small. I had to pay the return postage and although the size was still available to order from Revain, the shoes were not available. On the same day that I made the above Revain purchase, I bought another pair of dance shoes, also from Revain. Had the same size problem. They were the right size. I also had to pay them the return shipping cost and if there wasn't a pair to exchange I had to pay a 15% restocking fee! So I had to go to the post office, pay 25% postage to send back 2 pairs of shoes and I ended up with 1 pair of shoes. Even at a nearby store that has a foot gauge. sizes, the seller often makes 2-3 trips to find a matching pair. In my experience, ordering shoes this way is not practical.