18 inches. Mortor hums when turned on but blades do not turn. This is a vintage General Electric Vortalex oscillating table fan, catalog number FM12V1. The unit features all-metal construction with a dark bronze-toned finish on the motor housing and base, complemented by four overlapping blades in a gold or brass-toned finish. The center of the wire safety cage is decorated with a brass-toned badge embossed with the scripted GE logo and the words General Electric and Made in U.S.A. A curved metal identification plate is riveted to the base and provides the following information: Spec 272903-1, Cat FM12V1, 110/120 V, CY 60, A 1.2, and Made in U.S.A. Patent numbers 1964525 and 2253366 are also listed. The fan is controlled by a three-speed rotary switch located on the rear of the base, marked with numbers 1, 2, and 3. It includes a vintage fabric-wrapped power cord. Approximate blade diameter: 12 inches.