Substitution for "?android:attr/textAppearanceLarge"

I'm porting an Android App I wrote using Android Developer Tools to Xamarin Forms. In ADT I used "?android:attr/textAppearanceLarge" to set font size, which resulted in a sensible size across several devices, screen resolutions and pixel densities. In Xamarin Forms I used <Label Font="Large" ... . Unfortunately on my Android Phone with full HD display, the text is displayed much smaller than in the original application.
Is there a possibility to use ?android:attr/textAppearanceLarge or the corresponding font size in Xamarin Forms?