Here are the bangles that Aerith Gainsborough wears in the screenshots that Square Enix released for the Final Fantasy 7 remake.
I just had one render to model these from, so they may not be 100% accurate by the time the game comes out.
These bracelet openings are 8cm in diameter.
PLEASE RESIZE THEM TO FIT YOUR WRIST.
This may involve some trial and error on your part. Most bracelets are 6.5cm to 8cm.
Anyway, I hope that they are useful for you. :)