This pattern is Simplicity Crafts 5233, a popular 2004 collection designed by Carla Reiss for creating cat beds and toys. It is a "One Size" pattern that includes instructions for five distinct projects. 

Pattern Projects

A: A "Fancy Filets" tuna can-shaped cat bed with an open lid.

B: A soft-sculpted cat-shaped bed featuring plush paws and a hanging tail.

C: A large fish-shaped pillow.

D: Small mouse-shaped pillows/toys.

E: A cozy play sack for cats to crawl into

Envelope is opened, but pattern is unused/uncut. Feel free to ask any questions.