Disney created a set of Muppet knit hats in 2010, which were sold at the Disney theme parks. There were three hats in the set: Kermit the Frog, Animal and Beaker.
In 2011, Spencer's offered a similar trio of hats, produced by Concept1: Kermit, Animal and Fozzie Bear.
Disney theme parks
Animal knit hat (adult size)
Animal knit hat (kid size)
Animal knit hat (baby size)
Fozzie knit hat (adult size)
Kermit knit hat (adult size)
Kermit knit hat (kid size)
'Kermit' Junior Laplander Hat
Kermit Laplander Dangle Infant Hat
Kermit Black/White Lapdangle Hat