Hello Ming, there is no such thing as being too late for a breast augmentation. I have personally performed breast augmentation on women in their late 50's early 60's. Size is hard to predict without your chest measurements and body frame. You look to have good quality skin so I believe that you may be suitable for implants placed over or under the muscle - however looking at the size of your breast, sometimes it's best to go under the muscle to avoid seeing the implant or "rippling" but his would be determined in your consult. Being concerned about complications post surgery is a common fear among people who opt for cosmetic surgeries. Unfortunately even the healthiest of people may need revision surgery due to many reasons such as rupture, rotation or cosmetic reasons. There is a possibility of complications with any surgery however we discuss all of this in your consult, and advise how we minimise these risks.