Here's an idea my partner suggested for gauging size... Multiply the length by thickness (as measured with a tape measure wrapped around the thickest part of the cock). He's 9 X 7 which gives him a "mass factor" of 63. I'm 8 x 5; so my mass factor is only 40. Other examples: say you're (or you know someone who is) 10" x 5". You can conclude that it's a long dick, but it really doesn't have as much "mass" as a dude with a cock that's (only) 8" X 7" (mass factor: 50 vs. 56). While size may not be everything "mass" definitely is something...think about it the next time someone says they're 10"!