I've searched around and when you search hard enough, they kind of contradict each other. I sized down .5 for my first last 337 shoes and had to return them. I based my initial decision with what I found on the forums in addition to asking a couple of stockists. With insurance and such, shipping came out to be around $40-45...ouch. What size are you in other makes? Perhaps that will help me gauge more accurately. Thanks for your 2 cents BTW!