50ft Woman

Son 1: "The woman in The Attack of the 50ft. Woman poster must be more than 50ft."
Me: "Yeah. About 150."
Dad: "Let's see, if we assume that man is an average height, the relative..." <math break>..."I get 163 feet."
Me: "What did you use for your height?"
Dad: "6ft."
Me: "That's your problem, average male height is around 5'9'' in the U.S."
Dad: "We picked a tall-looking man. But I guess we need to Google the length of a 1958 Studebaker."