Go to REI first, next are the stores in Truckee, Reno and Tahoe search online).. I have lots of foot problems.. I must buy a full size larger than my measured foot size to allow for swelling on long hikes/ climbs. Scarpa for wide foot, sportiva for narrow foot..except for the Spotriva Nepals... You can return anything you buy online.. The lighter boots will only have the heal ridge for simi auto Crampons. The heaver winter boots also have the extended toe piece for auto crampons.. Crampons made specifically for ice climbing usually require auto compatable boots.. Call me anytime for more info 573-541-5415