I tried one on last week in Boston. I called them after reading your post and it is 6" and they call it small. It fit me so that works for me. Maybe they had a smaller one at one time? The communication with them is difficult they call them small medium and large for the height and the inside dimension they refer to as medium (even though Boston referred to it as small). I also called Montreal and got the same answer.
MatAllston - Do you have it in silver or gold. I am debating on the two. Did you have a break in period or was it ok at first? I have a December birthday and am hinting that I want one for Birthday/Christmas.
I was interested in the YG version initially as I prefer owning fine jewelry and I am not into silver. I tried and the YG version did not look good on me at all and the silver one did. I am so happy with the silver one although I need to clean/polish it often. Overall, I am glad that I didn't go with the YG version as the silver looks great on me and the cuff gets scratches easily. I would be upset for spending more than $10k on the YG version and seeing scratches on it.