Handle. Created for a surfski Paddle shaft grip.

Select the file with the number in mm closest to the width of your closed fist excluding your thumb,
I tried the customiser but it failed: my model only compiles in wire frame mode in openscad. I've put up some different sizes for people instead. Compared to my fingers a lot of guys have troll fingers.
As compiled, fits a 28.52mm diameter shaft.
Print with a 1mm brim. Best one at a time, I tried a batch and got missed steps, it's a fairly straight forward print on it's own though.
You'l