Yer gettin' no answers probably because nobody knows. Boobs aren't very easy to weigh (its virtually impossible w/ small or perkie ones) & its still very tough to do unless a woman/girl is willin' to whip 'em out in the grocery store & climb up on a fruit display or hijack a baby scale in the doctor's office.
Your typical mail or parcel scale isn't stout enough for very large, dense boobs so that method is out. A bathroom scale isn't very accurate. It is difficult to estimate boob weight visually b/c it all depends on density, not size. My wife's are extremely heavy due to bein' very dense. As close as we can tell they're about 20+ lb each. (We've never found a suitable scale to get a good weight for them.) Her's are bigger than Eden's, so were I to venture a guess I'd say Eden's are probably in the 10-15 lb each range.