Summary

I needed to extend a baseboard by a few inches, so I 3d printed this. It is based on the L163E design, which can be found at many big box stores.

9/16 in. depth
5-1/4 in. height

https://www.homedepot.com/p/Woodgrain-Millwork-WP-L163E-9-16-in-x-5-1-4-in-Primed-Finger-Jointed-Pine-Baseboard-Molding-10004151/206159404

Printed on an Ender3 with basic settings in Cura, 20% infill was plenty.