In one embodiment, a device measures the length of the urethra. The device includes a hollow tube having markings, wherein the hollow tube includes an internal end and an external end. The internal end includes one or more fins that can be manipulated into an open position and a closed position. The external end includes an opening allowing the insertion of a push-tube sliding axially within the body of the hollow tube, the push-tube being used to manipulate the fins into the open and closed positions. Further, an outer ring moves axially along the exterior of hollow tube and is utilized to measure the length of the urethra.