My family owns and operates the local music store and I thought I’d cut some stuff for them. 
These guitar pick trays are around 7.25 inches long.
I cut the first ones from MDF and plan to cut some from solid pine that I have in stock. 1/4" bit took around an hour due to excessive z action.
You can sort of see the tabs on the ends. I thought they looked good in the midst of sanding them away. Like a detail otherwise unatainable.