Does anyone know if the Metrics run small? I really want to get a pair and normally wear at 6 - 6.5 (yeah, I know), but the smallest size they make is a 7. My local doesn't have any Metrics in a size 7 so I can't try them on in-person. My normal size in a Lynx Zero is snug, even with the lacing fairly loose, so I'm hoping someone has an answer.