I have one, I don't know if it is the "fat" one or not. It is 6 inches long and 1 3/8's inches in dia.

They work pretty well actually. They are a bit heavy becsause of the gel that is in them. I also think they have a bearing or something in them as well. Mine has the limb saver on the end.

I looked it up, mine is the Super fat 7 1/2 inch model, they must include the limb saver in the length.

You can go to Cablela's web site and look at them. It lists the lengths and diameter of the different models. It says 1 1/2 inches for mine, but I checked it with my calipers and it is 1.393 inches.

Paul