What bra size would you say this girl is? She's about 5'7" (170cm) and a size 14, which is a 12 in North American sizes, 42 in European so I reckon pretty huge judging by her cleavage and the size of them in proportion to the rest of her.

Second image added as another gauge of size. Fine pair on her anyway.

Good photos.

She looks to be around American 38-D

You think? I always thought quite a bit bigger, given that she was fairly tall (5'7") and quite voluptuous generally (like a US size 12). But yea good pictures, fantastically well-endowed whatever size she was, just curious as to what people would guess as someone who fixates on these things a bit, ha.

Yeah, the jump to DD on girls near 6'.0 tall have some huge hooters hanging off their chest. I mean the size is very significant, you almost want to say E or F cup from a guys standpoint looking at them.

I estimated 38-D because to most guys, "D" cup may not seem as big when identifying with a photo, in reality women who sport 38-D have some serious sized breasts.

Go and google "Wifey's World" Sandra O. She's around the same height, wears 38-DD and her boobs look h( . )( . )ter-ific. So, 38-D is just about right on the mystery girl there.

Another in just a bra, anonymity bizarrely protected with a Homer Simpson mask (!!) (from some stupid party, good old Facebook).

Possibly. Mind you Boobpedia has her at 5'5", making her a bit smaller (and from the looks of it more slender) than this girl.

WAY more than a D cup. Judging by the first picture, like twice the size of D cup taking into account what you say about height and build. 36FF or 36G or 38FF/38G I'd say. The cleavage in that first pic is absolutely enormous, you could lose your hand in it it's so deep.

One gifted girl, that's for sure.