Improve your alignment on the putting green or tee shots with this golf ball stencil which allows you to mark up to 3 parallel lines with a standard or fine tip permanent marker.

Clips onto ball and has pull tabs for easy removal.

3D Printing Settings for reference: Bambu A1 mini PLA. Printed flat side down. 40deg threshold for tree supports and a 5mm brim. Layer height 0.12-0.16. 5 perimeter layers. 15-20% infill. Slowed down first layer speed to 30 mm/s. Might need some light sanding to touch up. Edit: Also print on its side which worked well.