Thanks for your query.Based on the facts that you have posted it appears that you have doubt in your mind that you have delayed puberty
as you think your penis and testicles are of the same size and not increasing over a period of time.
You have sufficient hairs over pubic area and your voice is also normal.This is an indication of normal growth .As growth of the penis and testicles is is very slow one can not notice it .
Mostly this is due to anxiety
. This can be confirmed by consulting endocrinologist
who will do some blood test
to estimate your hormonal