I am TOTALLY candid about discussing this, you can ask me anything. If it's too personal I may take it to PM
If your friend doesn't have much breast tissue and they do a lift, depending on which lift they do, her breasts could be significantly smaller afterwards.
I always had larger than average breasts for my frame and I nursed all 3 of my children. So my breasts after nursing 3 kids in 4 yrs looked like 'rocks in socks'. I clearly needed a lift as bras are tough to fit into when there's a lot of breast tissue but it's saggy. Plus, I kind of just wanted to regain some of my old physical self back.
I needed a keyhole/anchor lift to lift me enough to make it worth it. My PS discussed the difference in size w/ me and I was uncomfortabel w/ the thought of losing so much breast tissue. It would be a very noticable difference, even in clothing compared to how I looked pre-surgery.
I opted to have implants w/ my lift and I'm now just like I was when I was 20! LOL!
I was scared I'd be too big and I laways had a negative stereo-type about implants. . . it's still really weird to me when I think about having them.
I chose silicone over the muscle and they look and feel completely real, it's astonishing.
Over the muscle was recommended to me because I work out a lot and have a tendency to sag. If you tend to sag and go under the muscle you're more likely to develop 'double bubble' and when you lift weight the implant is distorted and you can feel it and see it.
As far as the stretch marks go, all the stretch marks that were below my belly button or lower are gone! That's the primary place for them so most stretch marks are gone after a tuck. Now, since I carried twins full term and I'm painfully short waisted I had some over the belly button. That skin is now below my belly button and I barely notice it.
I know this is more info than you wanted but I wish more people were willing to talk candidly about it before I had my procedures done.