This vintage  is called "Mouse in the Moon" and features a sweet little mouse wearing pajamas and a Santa hat. He's peering at his reflection in a plastic crescent moon. The ornament was first issued in 1986 and was reissued in 1987.

The mouse is made of hard plastic, but his tail is made of a tiny piece of leather. The crescent moon is made of plastic with a mirror-like finish. There's a hole at the top of the cresent moon where a piece of string or an ornament hanger can be attached.

The ornament has been displayed, so it shows some minor wear. It comes with its original box, which also shows a little wear.

The back of the ornament is marked "1986 Hmk. Cds."

Measurements:

Length: 2 5/8 in. (6.7 cm)
Width: 1 3/4 in. (4.4 cm)
Depth: 7/8 in. (2.2 cm)