The Flintstones Size Comparison Model Sheet (Hanna-Barbera, 1980s). After their initial season, The Flintstones spawned a multitude of spin-offs over the next 30 years. This is a rare original studio size comparison drawing, most likely used to make a new size comparison model sheet for the animation staff. It features the entire Flintstone and Rubble families — Fred, Wilma, Pebbles, Barney, Betty, and Bamm-Bamm. Dino is on a separate piece of paper that has been taped to the original sheet. The entire piece measures 10.5″ x 15″ and the characters range from 3″ to 6″ tall. The original graphite artwork is taped to a pink backing board.