2/7/26 - Updated to include the ability to customize to better fit chopsticks that were not the size I use.  For reference the default size remains the size listed below, but now you can change to better fit the size you have.  I did put a size limit on, purely because I could not imagine chopsticks larger than .3" in diameter.  The model started acting crazy when I tried going much bigger, that seemed like a reasonable limit to set.

Wanted chopstick trainers for myself and son.  I didn't find anything that worked with our favorite local Chinese restaurant chopsticks, so I made these.

For reference, the chopsticks I designed this for measure about .190" (4.8mm) in diameter.

Print in PETG.