Pen Sleeve - Triangular (for 9.5mm round MUJI pen)

This is a sleeve that fits 9.5mm pens, which you could personalize or just use for a triangular grip for students or comfort.

For precise fit, try scaling from 97% - 103% to fit your brand of pen.
This size fits a 9.5mm round pen after printing ABS.
The actual internal diameter (I.D.) of the model is 9.8, but the ABS shrinks to 9.5mm I.D.