I'm 13 as well and my penis is 4 inches from the side and 5.1 inches from the pubic bone. The average penis size for 13-year-olds is about 4 inches from the pubic bone (I think from the pubic bone). The lowest average is 3.5 inches and the highest, 5.35 inches (for 13-year-olds). If you have pubic hair, are taller than 5'2" and have a shoe size of 8 (adult, Canadian), then your penis will be around 7-8 inches. If you do not meet these standards before you are 14, then your penis will be around 6-6.5(maybe 7).If you are FAR over these standards, and are not on seroids, then you'll probably have a 8-10 inch penis (maybe more). This is all based on averages, so you could be a 5'0" adult with a shoe size of 6, and have a 13 inch penis. You'll just have to wait or invent a time machine. P.S- If you eat a lot of processed meats, you may advance through puberty faster than others because of growth harmones and anabolic steroids in the meat. Farmers inject thei...