Loretta Vibrating Urethral WandRequires 1 x AAA batteryapproximate measurements- SMALL -Overall length: 173mm / Insertable length: 97mmPlug width: 7mm- MEDIUM - Overall length: 256mm / Insertable length: 180mmPlug width: 7mm- LARGE - Overall length: 310mm / Insertable length: 235mmPlug width: 7mm