The Chase 'N Chomp Corky Tug is a great fetch and tug toy. It features 7/16" soft cotton rope knotted into a monkey fist at the end. For added grippability, there's a soft rubber section above the knot that's 1.75" diameter and 2.5" long.
The toy is 16" long from the bottom of the monkey fist to the tip of the handle. The monkey fist knot is 2.75" diameter.