My Smart Doorbell is bit well blended and many people do not know where to press.
Did this label to stick on my doorbell and the issue is solved.
Measured my Aqara Doorbell G4's bell button to be 47mm (diameter). This label is exactly the same size.
Feel free to adjust as needed.
There is a colour change set at layer 7 so that this can be printed in 2 colours.
Feel free to adjust as needed.