Change Fontsize for MobilePopupMenu

I’m working on an App for mobile phone (small screen) and for tablet (big screen). When using MobilePopupMenu I ran into a problem:
Although MobilePopupMenu works technically for both (phone and tablet) - on phone the fontsize is fine - readable and operable. On tablet-resolution not - I tested it and especially elder persons - due the small font(size) they had problems to read and select rows correctly .
My question - is it possible to change font(size) for MobilePopupMenue?