'What gets measured gets done.'
So yes, this contest is a penis measuring contest, but not the kind we usually think of. Most penis contests focus on length, using rulers or measuring tape to calculate how long your penis is. If you're in the US, it's in inches, but in the rest of the world it's centimeters. Although the length is the same, it certainly is easier to swallow a length of 15 centimeters rather than 6 inches.
This contest is all about girth, the thickness and width of the contestant's member. A special ruler is used, one with holes each guy must try to squeeze his penis through. The guy ending up squeezing into the largest hole on the ruler, takes home the prize!
Below, it's down to two, and the final penis, takes it's turn squeezing through the ruler's holes.
And we have a winner! I'm not sure what he won, but in this case, I think it was the judges who really got the biggest prize.