I made this cute fan art to send with my Christmas cards this year. They are easily colored with permanent marker.

Model is available with and without Santa hat, and with the pieces together in card form or separately.

The card with the Santa hat is under 4 inches, so it'll fit in most card envelopes. If you want to fit it in a 3 x 5 envelope reduce the X-Y dimensions by 75% but don't change the thickness.