Each of these is 3" with curl text having double copyright symbols and "1987 Pizza Hut Inc./1987 Hanna-Barbera Productions." This was a 30 minute animated TV spin-off of the Flintstones which followed the adventures of Fred, Barney, Wilma and Betty (along with their pet Dino) as children. Thus they are pictured as children on these four buttons. Each has typical but exceedingly minor hairline surface marks but all display Essentially Mint as made. Although not that old, the only examples we have seen.