10 inches. Works but the cord is frayed and brittle. This vintage electric table fan is a Zip model manufactured by the Knapp-Monarch Co. The unit is made of metal with an industrial green painted finish and features a four-blade configuration. A circular wire cage provides safety for the blades. The fan rests on a flared conical base that includes a single black toggle switch. The back of the motor housing is designed with radial ventilation slots. The center hub displays a circular label with the Zip brand name and specifications including 110 V 60 CY and FOR ALTERNATING CURRENT ONLY. The fan includes a brown cloth-wrapped electrical cord.