Hello
As suggested on here, I have now measured myself and my measurement just under bust is 31 inches. My measurement at 90 degrees is 39 inches. This makes me sound like Pamela Anderson but much to my dismay, my breasts are NOT of the round and full variety, which is why I'm a little sceptical of online estimations but maybe if you take my shape into consideration, it might just work? Thanks!! :-D