R. H.
The model 25 Trapper is 1 inch in diameter and 3/8" thick.
The model 26 Pathfinder is just a little larger than 3/4" in diameter and also 3/8 thick.
You do know that it is not perfectly round as it takes on the contour of the stag. The blade tang isn't very close to being centered in the butt.
Hope this helps, Craig