The SKEYE Nano Drone (US) : Meet the SKEYE Nano Drone, the shockingly agile, and tiny, flying machine. At just 4.0 × 4.0 centimers (or 1.57 × 1.57 inches) in size, this mini-quadcopter is perfect for airborne stunts (like figure 8s, banking turns, flips, etc) both indoors and outside. via Pocket