Ignite Butt Plug Black Dark Skin Tone from Si Novelties. Bum plug. Size length 4.51 inches, diameter .92 inch. Smooth shaft and an anchor base. The head of the plug is a little larger as you go down. The plug features a t-shaped base. Which makes it easier to use and to prevent plug from accidentially getting lost. Great for beginners. The smallest butt plug in the series. Made of body safe materials Vinyl. Materials PVC phthalate free. Si Novelties - Ignite.