Just came across this formula while reading through this thread, thank God appropriate watch sizing hasn't come down to this. Really it comes down to the interplay between two words: objectivity and subjectivity. So, in simple terms - how it looks compared to how you think it looks, compared to how any third party thinks it looks. Aesthetics and maths don't mix, it's a left vs right side of the brain-type thing.Leon O wrote: ↑Mon Mar 23, 2020 12:04 am
For reference there's an intersting post here about a mathematical watch sizing guide: https://forums.watchuseek.com/f2/my-mat ... 92616.html
1/ Convert wrist size into mm
2/ Divide total wrist size in mm by the size of the watch
eg A 7 inch watch and a 38 mm watch = 178mm divided by 38mm= Ratio of 4.7
This brings me to the controversial part. What is an acceptable ratio? I think using this formula, that an acceptable ratio falls between 4.0 and 5.0. Anything below 4.0 is too big and anything above 5 is too small.
Here is an example using a 44mm watch which should be too big for some with smaller wrists
6.5 inch ( 165 mm) Ratio=3.75 Too big
7.0 inch (178mm) Ratio=4.0 Just ok- acceptable
8.0 inch (203 mm) Ratio=4.6 Great fit
This brings me to interesting observation that wearing a 39 mm watch on a 7 inch wrist has a a very similar Ratio as wearing a 44mm watch on an 8 inch wrist. That is, a ratio of about 4.6.
For reference, here are the conversions for wrist size
6 inch = 152.5 mm
6.5inch = 165mm
7inch = 178mm
7.5inch= 190.5mm
8.0inch = 203mm
8.5 inch = 216mm
Des