To make your characters measure up—literally—you need to figure out the correct proportions. In cartooning, a character’s body is sized in relation to its head, which is the standard unit by which characters are measured. Characters look cute and young if they’re 3 (or fewer) heads tall. Conversely a character that is more than 5 heads tall looks grown up and more mature. The average adult character is 5 or 6 heads tall, but exaggerated characters like superheroes and glamorous fashion models can be 8 or more heads tall.