Low Poly Tombstone Post-It Note holder

Had a request for a quick and dirty tombstone Post-It note holder. Nothing fancy, but that was kinda the point. I'll likely do a higher resolution version later, but if you too want something low poly on purpose, have fun.

This is designed for US sized Post-Its, which are 3" by 3". That works out to be ~76mm, so I scaled the divit to be an even 80mm, so you can easily get them out to refill but not too big that it is a sloppy fit.