This item is a block of four faux postage stamps (artistamps) featuring Geronimo. The Apache Chief Geronimo (Goyathlay; "One who Yawns") terrorized New Mexico and Arizona for over 25 years, defending his people against the encroachment of Mexican and American soldiers, settlers and miners on their tribal lands. This artistamp was designed by W.C. "Bill" Porter and manufactured by the Olathe Poste (Olathe, Colorado).

The actual size of this block of four artistamps is 77mm x 73.5mm (3.0" x 2.9"). Possibly attached sheet selvage (as seen in the image above) is not included in this measurement.