Heidi Montag

Height: 5' 2"
Weight: 105 lbs.
Cup Size: 34DD
Waist: 23"
Hips: 33"

Barbie Doll

Height: 7' 2"
Weight: 101 lbs.
Cup Size: FF
Waist: 19"
Hips: 33"

And while we're talking, let's just add that:
1) Heidi's new boobs are just short of the maximum size allowed by law. Hers are 700cc; the limit is 800cc.
2) She told Jay Leno that she wants to be an H-cup.
3) This blog exists. (Please read the post about "back scooping.")
4) This woman got a boob job and looks like Heidi, but that's where the resemblance ends.