1.5"x .5"/ 3.75 cm x 1.25 cm. Extreme pleasure with these discreet and versatile bullets. 10 functions of vibration, pulsation, and escalation. Powerful and whisper quiet. Micro-bullet self-heats for added sensations. Ergonomic controller with easy touch buttons, EZ on/off button, and LED light. ABS with metallic plating. 2 AAA batteries.