Jon is a tall and skinny adult man with light skin and curly, messy brown hair with a black mullet. While he wears shirts of different colors, he is most frequently seen in his signature powder blue polo top. He also wears dark blue pants (in older appearances, he wore black pants) and brown shoes. In Garfield and Friends, he often wore brown pants with a darker blue shirt.In the November 22, 1985 comic strip, RX-2 states that Jon weighs 175 pounds and is 6 feet. 