Well there are lots of products available in the market for male enhancement but you will find that none of them actually work.
Penis enhancement supplements and such are well known scams
Does The Male Enhancement Product "Maxim" Really Work?
You can do regular exercise and exercise like Jeqling. I have tried it. The changes haven't been HUGE, but I will persist for my lover as he enjoys a deeper intimacy with me.
I have not seen anything that actually worked. I even tried tying weights from a dumbbell to the end of my penis and leaving them on there for as long as I could stand. It didn't seem to have any effect on the size of my penis!