TIL the best way to calculate a cup size of an anime/vtuber character using their reference sheet. Context: Since I was bored, I decided to use this knowledge to make a website that anybody can use where you can drop some sort of ref sheet with a front and a side profile, and then drag and align red lines with the body, for it to automatically do the maths involved, giving you a cup size, with a cool overlay that you can export as an image like the one attached to this post. (Using Chisaka Airi as an example) The math involved, uses Ramanujan's Approximation for elipses which is what chests are modeled after. SFW