I have made a Ruthenian sticker:
{{User Ethnicity|flag=Cieplice_Jaroslaw_Galicja_Austria-1.jpg|ethnicity=Ruthenian}}
(I had to type that out/no copy/paste so if I doesn't work, send me a message.)
I didn't use a flag, but a small map of where Ruthenians lived across Poland, Ukraine, Slovakia. If you look up my free space page on my profile for Cieplice (in my bio), you will find a larger photo of the map.