Inside measurement end to end: 5 5/8″ 
Opening: 1 3/8″ 
Diameter: 2 1/2″ 
Width: 1 1/4″  
Tribe: Navajo
Material: sterling silver
Stone: Turquoise
Hallmark: “U.S. Navajo 60” (Santa Fe Indian School, 1938-1943), quite possibly made by Ambrose Roanhorse while teaching there