The SMP Beginner Pump is perfect for those just starting out. With a soft sleeve, easy squeeze pump, flexible hose and quick release valve, you will have no trouble.Also Included is the Triple Erection Ring Set, colors may vary. Pump Measurements: Approximately 8 inches in length, circumferences of 7 inches (tip) to 7.25 inches (base) and opening of 2 inches in diameter.