Found in a Canadian cereal box, not sure which brand, more than likely, Kellogg's, Post or Nabisco Shreddies. Discovered in a box of vintage cereal premiums, some that I am also listing today. Celluloid plastic eyes and mouth mounted on a cardboard backing with instructions. The mouth fits nicely on the instruction cardboard but pops in and out easily so I took a separate pic of the 2 pieces while  separated. Measures 3” X 4”. Could not find any info on this item on the internet. As a bonus, I am including a “ moustache mouth” which has been folded as instructed, but no eyes to go with it. These cereal premiums were more than likely used and thrown away, so to find these in such nice condition is especially rare . May be only one of a few that still exist, hard to determine. Smoke free home.