Hi mate, thanks for writing in.

At 15 you are still physically growing so your current penis size may change. The penis stops growing when a guy finishes puberty (at about 17–20 years of age). Your best option is to wait until puberty finishes and you stop growing. That way you will know what your actual penis size is.

For some guys, the penis in its usual state—called flaccid (meaning soft or limp)—can be misleading. This is because for many guys the penis is a lot larger when it's erect than when it's flaccid. So penises are measured when they're erect.

The average (erect) penis size for Caucasian adult men is 15 cm or 6 inches (measured along the top of the penis) and 3.5 cm wide (across the penis, not around). Most men's penises are 5–7 inches long, however penis size may vary for non-Caucasian races.

Normal penises come in all different appearances, shapes, lengths, widths and skin colours. It's normal for guys to compare their penis to others. However, penis size is inherited and is unique for each guy. By the way, if you want a bigger penis to impress girls, girls who like guys tend to be much more interested in a guy's personality and how he treats her than his penis size.

Even though you're too young, like you say, to buy penis enlargement drugs or other products, beware of products or information about ways to increase penis size anyway, because they generally don't work, cost money and can have side effects.

If you are still worried or have more questions, you can visit a local doctor or sexual health service. It may seem awkward to talk about these things with doctors or nurses but remember that they are professionals who deal with these issues all the time. You could also check out the penis enlargement section of the Somazone fact sheet (see link below).

All the best.