Smallest hole on short band.
Due to the way the sport band goes out to the sides a bit instead of going straight down, I have a little bit of space where I can fit a finger in both sides, lol, which is to be expected since I opted for the "bigger" model. But it doesn't slide around and it stays in contact with my wrist so that's what matters. I haven't worn watches in a long while (and I used to wear them on my right wrist!) so I thought it might not be comfortable but it is. And I LOVE my watch!
Hope that someone comes out with a form-fitting "cuff" style band soon!