I love this tail, one of my favourite toys in my collection. I'd call the size of the plug somewhere between a beginner and intermediate size - extremely comfortable once in, and the hilt part makes sure it stays where it is. The tail part is very flexible so wagging is very easy, and doesn't have too much weight to it. Silicone feels silky smooth, and cleanup is always very easy. 5/5, would recommend, especially if it's your first tail like me.