hmm, I think with an even number you add 4 and that's your band size, with an odd number you add 5. So your band size would be 46? Then you're suppose to subtract the band size from the bust measurement, for example with me, I'm 27 or 28 inches underbust, which would make me a 32 bandwidth. I measure my bust at 35 1/2 so I subtract and get 3 1/2. If you get 0 you're a AA, 1 it's an A, 2 it's a B, and 3 is a C, etc. But that doesn't make since for you to be a 46AA. I don't even think that exists! My adoptive mother wears a 38B (very hard to find) and her underbust measurement is more than 38, and she wears it comfortably. So I think it all depends. Dammit why do bra measurements have to be so complicated! GRRR!!
Is there a way for you to dress as a female and go to a Victoria's Secret or some type of lingerie shop and be measured? Maybe they could tell you better. And I have a friend that works at VS they get transsexuals, cross dressers, etc. there all the time, and if they say anything inappropriate you can report it to the manager, they are suppose to treat you like anyone else. Even if a male comes in that is not cross dressed or a trans, they are still suppose to measure and help the customer. I talked to a lady online from a BE forum that said she went to be measured at VS and came out to be an A or AA I can't remember exactly, but she said the saleslady laughed at her and said they don't carry her size, but maybe she could find some training bras at the Gap or JC Penny's. I told her she should have reported her to the manager, cause VS DOES carry A's and AA's. And they are not suppose to laugh at anyone like that. Even if they didn't have her size, they sell sports bras, and they have other stuff she could try, so she lost a potential sale (sorry my marketing/sales side coming out lol).
Joan, didn't you say you wear a C bra? What bandwidth is it? Is it comfortable to you?