Your doctor will tell you when you are ready to be fitted for a permanent breast form or prosthesis. Most of these forms are made from materials that approximate natural tissue - its movement, feel and weight. A properly weighted form provides the balance your body needs for correct posture and anchors your bra, preventing it from riding up. At first the form may feel too heavy, but in time it will feel perfectly natural.
Prices vary considerably.
A high price doesn't necessarily mean that the product is the best one for you. Take the time to shop for a good fit, comfort and an attractive and natural appearance in the bra and under clothing. Your clothes should fit the way they did before surgery. The right bra for you may very well be the one you have always worn. It may or may not need adjustments.