Is it girth or length? If you really want to know the relative size of your penis,
the best measure is volume.
Let's take these photos posted here by buth and hubby_it.
To figure out volume, first you need to know Length and Width,
which judging from the rulers in the photo is (converted from cm to inches):
4.3"L by 1.5"W for hubby, and 9.4"L by 2.6"W for buth.
Assuming a penis is basically a cylinder, the formula for volume is:
1/2 of the Width multiplied by itself, times 3.14(pi) times the length.
For hubby, that's: .75 x .75 x 3.14 x 4.3 = 7.6 cubic inches. yay hubby, you've got 7.6cc!
Now let's try buth:
1.3 x 1.3 x 3.14 x 9.4 = 49.9 cubic inches. That's almost 7 times as much cock!
Try this on your own little penis, and see how YOU measure up!