Studies of penile length in children have been rarely conducted. In Korea, great improvements in height and weight have been observed.
Guys concerned about their penis size during puberty for two major reasons you stated is just smaller than the upper range of normal for pre-pubescent boys.
Here is a chart with normal penis size range by age from birth to puberty. At 12, you could be pre-pubescent, in the middle of puberty or all the way through.
There is a wide range of normal penis sizes. Although you may see guys with penises that are bigger or smaller than yours, it is very likely that your penis is a.
A few light-colored downy hairs materialize at the base of the penis. As with girls, the pubic hair soon turns darker, curlier and coarser in texture.