What season and episode of south park where cartman measure the boys penis?

In Season 3, Episode 9 of South Park, titled "Mr. Hankey, the Christmas Poo," Eric Cartman measures the boys' penises as part of a competition to see who is "the biggest." This scene is a humorous and controversial moment that reflects the show's often crude style of humor. The episode originally aired on December 17, 1999.