For measurements, search up "Tim watchbox" on YouTube.
The reps are fairly close to the measurements from Gen; but best to pick from the top factories and their latest versions. (APSF for 15450 and ZF for 15202 to my knowledge)
I've got a 6.5 inch wrist with a wrist span of about 51mm. Ordered a 37mm 15450 cause the:
1) 39mm 15202 lug to lug was borderline and
2) dial seemed more lively.
www.reddit.com
PS. I believe White/Silver is not available in the 15202 'Jumbo' but happy to be corrected.
Hope that helps bro...
Happy rep hunting!