Eight in a set, based on http://www.furaffinity.net/view/686787/

Fun fact! In my mind, Frillhorns typically have the 'frills' bent forward over their heads unless exited/upset/orgasmic/wailing in pain/what have you, in which case the frills will bounce right over to the back as posted in the pic itself.

This also doubles as my excuse as to why the hand looks NOTHING like the pic, because my fingers cannot emulate the 'fanned back' look unless I use my second hand...and aside from it being busy holding my camera, it's just not worth it in the end. So there you go.