If you're going online, look for free delivery and returns - in my experience, sizing goes out the window with this type of shoe. My first order was from sportsshoes.com as they were cheap - but when the shoes didn't fit, I found I'd spent a tenner just to try shoes on. Wiggle and Amazon are ok, but if in doubt, try and go to an actual shop. Just bear in mind, you're not going to get fell shoes in the usual high street stores.