For sizing - go up one size from street shoe size.
*Tips for trying on/ordering Jazz Shoes:
When in doubt, go up a half size/whole size.
Make sure your feet are clean and dry before wearing the shoes.
Should fit like a sock that is right out of the dryer.
Make sure your toe nails are clipped.
Toe should fit to the end of the shoe, and lay flat.
Shoes will stretch the more they are worn.
No socks of ANY kind should be worn while wearing jazz shoes.