Capacitive Touch Button

We are working on a PCB board that will include capacitive touch buttons. The glass overlay we are using is explosion proof with a thickness of roughly 9mm. I have included a drawing of what our PCB board will look like and the desired button size (13mm in diameter, with annular gap size of 2mm). If this button size is not recommended, what dimensions would you suggest? Also would like to know the suggested spacing between the buttons.Thank you.

Hi @MeganC, which Touch Sensor are you using in your design?

Microchip has a pretty good write-up here that can help with all the design considerations you need to analyze: