Surgery fails but...
Sizes are variable, average is 5 1/2".
If you have 3.0" or more, studies show you have enough to receive and give full satisfaction with most women, and many will prefer it, since most of their nerves are in the vulva rather than the vagina and you may have more control. Your erections may also be harder than a bigger man's. Talk with your partner and learn to use your entire body. Good luck.