This thimble is designed to look like how I imagine one might if turned on a lathe.
Not tapered along its whole height, so maybe more suitable for stubby fingers!
The model's internal diameter is 16.6mm - to change the fit:
Around 0.07mm layers gives the sharpest print results with grippier knurling.
Shiny filaments give a good look.
The examples shown are printed in PLA and PETG, but flexible filaments should work very well also; If the hardness is very low then scaling down a tiny bit more may improve the fit.
The author marked this model as their own original creation.