I just printed one off and did it myself. Flash drowned out some numbers, but yeah.
I think you should definitely be going with the 6.75" measurement, the 7" looks too loose. I maybe could have cinched mine down a touch more to 7.125" as well. Good tool! I like how we've went from 15300 v 15400 to measuring our wrists
This truly shows how subjective the watch v wrist subject is. As you can see, I'm 7.125"-7.25", pretty lean with a flat wrist, and I think that 15400 looked borderline silly on me. Yet on the other spectrum, we have guys with 6.25" wrists wearing them and the lugs overhanging. Same thing with a 40mm Sub, I think it looks great on my wrist, whereas others with the same size think it's tiny.