2.76 Inches

Motion activated peppy pet ball will works 5 minutes and auto-turn off. Touch to wake it up when the ball is in sleep When ball hid in somewhere, pets can't find it easily. AUKL ball will shocking 30s when sleeping time up to 1 hours, which will remind pets to find it and play. If not motion, enter standby again Active bouncing ball or soft rolling ball will pleasing different breed of dogs,energy boy will prefer active mode, you can add tails on if your dog not interested in. Carpet will effect ball rolling speed.