I had been waiting for Band 2 to be available in Australia and checked the sizing chart which placed me bang on between Medium and Large. So according to MS, if you are between sizes, go for the next size up. As launch date got closer I as checking and re-checking the sizing chart to confirm my size. I wanted to be sure because I would be ordering online without trying on first. Anyway, finally decided to buy from JB HiFi after redeeming points for a voucher and went in to get my Large Band 2. They had no Large bands in stock but offered me a Medium to try. It was a warm day which was good because it meant I could make sure it wasn't too tight and left room to adjust after exercise. Turns out to be a really good fit. I have enough clicks to loosen the band when I'm exercising without being at the maximum, and tighten again when I'm cool. I think if I went large, it may have been too loose on a cold day on it's tightest click. I have a round wrist, rather than flat and wide, so the band 2 is a good fit all around with hardly any gaps on the side.