Made to serve two functions at once, this Inflatable Dildo Gag will surely make things interesting. The inside part functions as a mouth gag that once securely put on, can be inflated. After the gag is put on, and inflate if desired, the other partner can then use the outside dildo for penetration. The partner that is gagged will get an up close view of the action as the dildo goes in and out. Measurements: gag approximately circumference minimum of 0 inches to maximum of 10 inches. Dildo 5.75 inches in insertable length and 5 inches in circumference at widest point. Category: Mouth Gags, Dildos, Master Series. Incubus Inflatable Dildo Gag from XR Brands.