I do like the shape and size of this plug very much. It is the perfect size for a person who has already enjoyed anal play and wants to be filled up. This plug measures about 5 1/2 in. long, with only 5 inches insertable, and it is about 5 1/4 inches at the widest point. It can be slightly difficult at first to get it all the way in when you get to the wide point, but if you give it a minute and don't give up, it is well worth it, and once inserted it stays in place with no problems.