This vibrating urethral sound has amazing potential. It is devious in its intended purpose, creating some intense urethral sensations. It also can be used as a pinpoint vibrator. Medium: 1.375 in. circumference at the tip and 0.875 in. circumference at the shaft. Total length of 11.5 in. with an insertable length of 6.5 in. Requires one AAA battery, not included.