>>18107851There's the boobpedia wiki which lists models by their self-reported bra size, but I'm kind of wondering if you actually know what "DD" means. The letters try to represent the measurement difference between the circumference of the chest below the breast and the circumference of the chest at the breasts at their largest point. It's more complicated than that, but the bottom line is that a 30DD and a 40DD will be completely different breasts. The former would be big ol' tits on a stick of a girl, but the latter would be underwhelming breasts on a girl that's on the wrong side of the fat/chubby divide. If this doesn't make sense, hopefully this image might help you.
Also try googling "bra sister size." There are a whole lot of women that wear the wrong bra size, usually going with a band that's too big and a cup that's too small.
So like
>>18107823 and
>>18107778 might plausibly be a DD given their chest size, but
>>18107811 and
>>18107800 and
>>18107771 are way bigger than DD for their chest size.