How many bra sizes are there? Well here's what we've managed to confirm so far (in UK sizing), and we know there are brands going up to 70+ inch bands (but aren't sure about the cup sizing system of a few so left them out). All the sizes listed here can be bought. The blue sizes are sizes we've made an info page for. For now, you can check our Bratabase.com if we've not made an info page yet. As you can see, it's going to take some time to complete. If you're a brand and you make a size not listed here, please let us know! #brasizes #bradata #brainfo #abrathatfits #biggestcupsize