3.15" Diameter Toy Balls Deep

I love my big tapered toy but it's a bit long. I decided to pick up a new toy that is a little thicker, still has a taper but is a bit shorter. I got this one off Amazon. It's 3.15" diameter or 9" circumference and about 8" insertable which is just a bit thicker than my big tapered toy which is 3.1" at the base and 11" insertable. I was able to sink it balls deep with no problem. Guess I need to go bigger?