Fan of role playing? Fantasy Novels? Just like giant winged lizards? This is the bottle topper for you. In for a landing on top of your favorite bottle. Nothing Like fire and brimstone to finish up your liqour of choice. The dimesions of this stopper are very close to my Poison skulls bottlestop. https://www.shapeways.com/product/DC7Y2VW3G/poison-skulls-bottlestop?optionId=64279391
18.3 inside diameter and 29.5 outside. The inner plug is around 17.5 slanted to 20 at the very top inside surface, so a bit adjustable. However the inside is less slanted at the top for skinneir neck bottles.