People are saying buy a size up which could be a HUGE mistake. The first time u try on boots will be the tightest they'll ever fit. The liner will ALWAYS get smaller as u ride. The best way to find ur correct size is try on a boot without the liner, Slide ur foot to the front of the boot. U should have a little more than a inch or two fingers of room from ur heel to the back of the boot. If u can fit 3 fingers or have 2 inches room ur boots are too big and your gonna have significant heel lift while riding which is no Bueno if u can only fit 1 finger than size up.Just bought these after using same Nitro boots for 10 years. They aren't any lighter than the nitros but the weight is distributed so much better. The nitros are very bottom heavy while these are super light in the soles. The nitros held up very well over the years but eventually the heels wore out. So far I'm very pleased w the fit and performance. Also very happy that someone returned these cuz they prolly mistakenly thought they were too small allowing me to buy these brand new boots "used" for $40.