Re: Sizing MS Band
Having looked at the "stack" at the store, I can say that the main difference between the sizes is the height. The electronics module is all the same so it's the same width at the display end. The difference is how soon the HR sensor makes it's bend to meet up with the clasp. The clasp changes the "width" of the band more than anything, but does adjust height somewhat.
I wear a medium about mid-clasp. I can wear a large if I tighten it all the way, but it's still just a bit loose.