Try on a lot of boots. You want a snug fit, but you don't want to cut off your circulation. You should have room in the toes. Most important, don't fall in love with the softest, cushiest boot in the shop, or the easiest to slide into. They will pack out, fit poorly later, and worst of all, hurt when inside your bindings, especially when turning.
Boots come in men's and women's sizes.
Try the Freestyle , FreestyleSI , Moto and Moto SI Boots. There's a world of information on clothing in our softgoods pages. Please take the time to read up on the technology and performance benefits. Technical underwear is a key overlooked component to staying dry and comfortable. Add thermal pieces if you're the kind of person who has a hard time staying warm.