I've been using a 1.66 inch ball gag for a few years. Lately, it just seem to be a little small, I wanted something bigger. I got this 2 inch ball gag to see what it would be like, and I gotta say that I really like it. It really fills my mouth well, it's challenging, but not uncomfortable until I've worn it for a while. My first session with it was about 15 or 20 minutes, and that was good. My jaw was a little tired, but not sore when I took it off. The strap is very comfortable, and it adjusts well to any size head. I also really enjoy the rounded silicon bars that cone off the ball itself through the corners of my mouth. My other gag has a nylon strap threaded through the silicon ball that rubs the corners of my mouth and irritates them. The silicon ball and the attaching bits are all molded as a single piece and causes no irritation at all. I look forward with great anticipation to working up to wearing this gag for an hour or longer.