It's approximately 1.2 inches
one inch
3cm avg
7''3cm im pretty sure
about, a diameter of 3cm
...WHYYYYY
Yes it is. Are you sure you don't mean cms not inches. 3in, yes. 3cm, no. im the same age and mine isn't even that big You don't get penis' that big in boys your age, not even in adults. I know kids exagerate but hey we are not stupid. A 12-year-old would average 3-3.5 inches long and about an inch thick.
I would say one which is about 3cm/inch across
27 cm3
54 cm2
9
The area is 9 sq. cm. or 1.395 sq. inches. Do your homework yourself