Hiya, don’t hold me to it but as a rule if your measuements from your the top of your sternum to your nipple are bigger than 22cm I think you’d need a lift. 21cm is normal, 22/23 is borderline and 24 is a definite lift…. Like I say don’t hold me to it but this was my dilemma before seeing the surgeon and after meeting him it was confirmed I needed a lift. I’m 5 weeks post op now though and I love them 🙂 xx