I've always heard boobs were in the 8 lbs range myself. Though can't recall if that's 4 lbs per boob or 8 lbs per boob. Especially when you're in the DDD and up range. But I can't personally validate the claim with any cited data. I just know this is how my girlfriend feels with her boobage and if she didn't hate surgery and doctors so much I'm sure she'd seriously consider a breast reduction