/cgl/ - Cosplay & EGL

/cgl/ please help me I have a migraine and can't think about this enough to actually figure it out.

I need to make these scallop doodads on the bottom of this skirt. I have the skirt pieces ready to go, but for the life of me I can't figure out how wide each of the bases should be.

According to the production / artist's notes, her skirt has 8-10 of the larger pointy things on the bottom (not shown accurately in pic related, but I'm going with that since it's on the official notes)

Obviously the short ones have a smaller 'base' than the larger ones, but there should be an equal number of each on the skirt.

I can't, for the life of me, figure out how to calculate how big the bases of each typ eof point should be.

The bottom of my skirt is ~40" in circumference, if that helps at all.