Image Source: Personal Photo
Last week I posted about printing a triangle opening tool and @davidke20 replied to the post mentioning how it was similar to a guitar pick. I don't play the guitar so I can't judge the quality of a guitar pick but I found several guitar pick models on Thingiverse by user gabrielfp and printed one. The model I printed was pick_v2_10.stl with 100% infill.
Image Source: Tronxy 1.4 slicer screen cap
The print consumed less than half a meter of PLA filament and was printed in less than 10 minutes. I am guessing for a hard guitar pick ABS would be a better choice to print with for this model.