FKNA, every F'ing day!
NEVER use that shoe-ski boot sizing chart. I am a 12.5 street shoe, and a 28.5 Salomon. If you get a 28.5 Salomon, you will cry through the season the shin bang will be so bad. I would say, maby, DON'T GUESS ON BOOT SIZE. One size off could either make your toes black, or give you lower shin bang that kills an entire season from one day of skiing. Seriously, go in and get fitted, or wait till more shops have them near the season, or if there is no fitter than ask to try on a 25.5 and a 26.5(one of those should fit you, it is usually two sizes down from street shoe size). Oh, and you better have WIDEE feet, or else you should try on other boots. Don't be set on a boot because it is popular.