i think lexi belle is fudging her numbers a bit
boobpedia is a good site but can be incredibly susceptible to exaggerations made by porn stars or their agents. however, bra size is a tricky thing i know, and can fluctuate due to weight etc. but you tend to be able to judge or guess cup size once they are under DD ... the article below is a nice read about how girls end up wearing bra sizes to big. i assume if the starlets are misrepresenting their numbers it's for career purposes but dont really see why they would since it's not like guys care greatly in fact most won't care at all) if a girl is a C as opposed to a B cup. i also realize complexities (rib cage, breasts at fullest point etc.) that go into bra size requirements so i could be completely wrong about them fudging their numbers. could be that some use the largest size they have ever worn even if it's not the size they typically wear. who knows. the trickiest bra size to guess is whether a girl is 34B or 34C
http://msbehaved.com/2012/04/11/brafitting/
for reference, vivie delmonico is listed as 34C yet seems noticeably bigger than other pornstars who claim to be C cups such as
Lyla Storm, lily labeau & dana dearmond (though to be fair dana is listed as 32C ... though they look like B cups, she is definitely bigger than 32B and based on my limited knowledge, it seems that girls toggle between cups sizes (B, C etc.) more than number size (32, 34, 36). so you're more likely to see her fluctuate between 34B and 34C than 34C and 32C).
jada stevens who states that she is 34B
Lyla Storm
lily labeau is a little more believable as a C cup but still think she is a B
vivie delmonico who is the only one of the 3 that is clearly a C cup