This vintage  from 1983 is called Mouse on Cheese. A grey mouse wearing a Santa hat is sitting on top of a wedge of Swiss cheese tied with a green bow. The ornament has a gold loop at the top for hanging.

The mouse has a charming expression and holds some cheese in its hands. The end of its tail is tied with a small red bow. The cheese is slightly translucent for a realistic effect and there are some bite marks in the end where the mouse has been nibbling on his delicious treat.

The ornament has been displayed, so it shows some light wear, including a scratch on the mouse's cheek. It's otherwise in good vintage condition.

The bottom of the ornament is marked "1983 Hallmark Cards, Inc."

Measurements:

Height: 2 3/8 in. (6 cm)
Length: 1 5/8 in. (4.1 cm)
Width: 1 3/8 in. (3.5 cm)