mine are bout 1.5 " in diameter when relaxed. ( i.e. no nipple erection)

. then again, they are always semi-erect due to the piercings. But I am sure I will get them to be a bit larger.
I have found some interesting info in wiki, though,. that HPL (human placenta) will help enlarge the areola significantly.. sooooo.... I looked up placenta on amazon... and apparently there is goat placenta available. I have heard of goat's milk being good for humans, and also heard that the genetics are not too far off... so .. to buy or not to buy????