15 and have high voice, small penis, no hair on legs

Low testosterone

Don't listen to Firs11. You're too young to worry about viagra pills.

You still have about 5ish years to grow (not just in your penis size).

I would recommend you start looking up anabolic/growth hormone increasing exercise and diet plans.

That way, you stay healthy, you don't have to worry about side effects from drugs, and you get a great body to match that will get girls to adore you even IF your penis size does not increase (which I doubt it would remain at that size if you do things right).

Also, penis size is not everything young sir, there are a lot of other things you will learn about sex later on in life. Being good at shooting hoops doesn't make you athletic, it's only good for you in one specific field of sports. Same thing with penis size and sex.

You really shouldn't worry as you are still developing.
It all depends on when you finishe puberty. A guy could finish at around 14 years old, or he could finish at around 20 years old, but usually a boy usually finishes puberty between 15 and 17 years old, with an average penile length of 6 inches.

The penis will have reached it's size by the time the male is around 20-years-old. This is when the person stops growing further in height also.

14-17 would be too soon. A boy usually finish puberty and become a full grown adult at the age of 18-20, maybe earlier.

everyone goes through puberty at different speeds and times so dont worry about it eventually your voice will break and your penis will grow dont worry about it