The SPK'sa re a wierd boot for sure. They fit my foot great, but when I buy mine this summer/fall, Im going to be going a full size down from my foils. Its weird, but in october i tried some on in Toronto, and I wear a 27.5 (315mm BSL) Foil, but a 26.5 (307mm BSL). Its sucks because Im going to require a remount on my Ar6's.