This restrictive gag has a butterfly mouthpiece that fits perfectly inside the mouth, once the gag is in, it can be pumped to a speech inhibiting size, to deflate, simply turn the release knob near the pump counter clockwise. The Outer Gag Layer Uninflated is  4.75″(12cm) diameter and 0.3″(0.75cm) deep, the Inner Gag Layer Uninflated is 2.45″(6.2cm) diameter and 0.55″(1.4cm) deep; Tubing and Cap are 10″(25cm) long, Black