What shape of eyelids do i have?

This may sound a little strange, but I wondered what shape of eyelids I have? I was wanting to know so I could get some tips on make up. I have looked at shapes on the internet and I think they are prominent or deep set. So you can make up your mind, my top eyelids are exactly like Madonna's were like in the 1980's, triangular when she tilts her head back? Any answers would be most appreciated - thanks!