Ignite Butt Plug Vanilla Light Skin Tone Medium from Si Novelties. Bum plug. Size length 5.50 inches, diameter 1.57 inches. 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 and the next step up for anal play. The middle medium butt plug in the series. The second middle size of the Bumplugs. Made of body safe materials Vinyl. Materials PVC phthalate free. Si Novelties – Ignite.