The only way you will truely know your size is by TRYING ON the shoe. Every brand, style, heel height, and material will feel different!
Shop arround! Go to different shops and try on different sizes. However, try to buy your first pair through a shop, especially if its the shop where they helped you find your RIGHT SIZE. It’s not cool to find your size then order them online. IF everyone did this dance stores would not exist.
You can find shoe vendors at dance parties, festivals and congresses. Take a minute and try on their shoes, even if you are ‘ not in the market.’ You will know your size and style so you can order them in the future. And…. if you have to…. try on your friends shoes– before they dance in the shoes for hours, and especially if they are NEW!