Sex Reassignment Surgery :

Change of sex from female to male, involes excision of breast, uterus & ovary. Recostruction of penis by free radial fore arm flap, which is microvascular reconstruction of penis.

Change from male to female, involves reconstruction of vagina from penial skin, breast prosthesis, laser hair removal etc.
Size of penis can be increased by fat injection, in penis, collected by liposuction. This is a repitative procedure.
Shape of female genitalia is changed by cosmetic correction & fat injection popularly known as designer vagina. Hymen can be made tightened by hymenplasty.