I have seen this same formula over and over, and I don’t understand it.

Measure around your chest, under your boobs. Add 5. This is your band size.

Measure around the widest part of your boobs.

Subtract the FIRST number from the SECOND number. The difference is supposed to give your cup size. A difference of 1 is an A cup, 2 is a B cup, and so on.

But when I do it, the first number ends up bigger than the second number, leaving me with a -2.

Now, I happen to have quite decent sized boobs. But if I follow those sizing directions, it gives the impression that I have a pair of 2 inch deep cone-shaped depressions in my chest. I suspect I could get better results trying to determine my bra size by reading sheep entrails. I’m wearing a 40C right now, and it’s comfy and stuff, but if I go by that formula I should be sporting a 3 inch difference between band-size-plus-5 and widest-part-of-boobs to be able to wear this bra. And I’m not. It’s -2.

Am I a mutant, or is this that New Math I keep hearing about?