I have the badges on my tank(70mm flat), on my engine spoiler(from a k100) in the stock location(60mm flat), on my rear wheel cap(70mm flat), and on my rear cowl(45mm domed).
The tank size and the engine spoiler size match stock. The rear wheel never had a badge stock, I added it for my build. The rear cowl is custom made, I dont know OEM badge size for the stock rear end.
I do not keep my bike parked outside in sun for long periods of time, but I suspect the inks are fairly sun safe since they are intended for use on car wheels which see a lot of abuse.