I was requested to produce a 'fine' pencil holder. In order to set exactly how many pencils you need it to hold, I supply the openscad file. The customizer lets you alter also you may preview the stand with the pencils in it also and the pitch of the pencils.
The stl is for a 48 pencil holder (it is nearly 200 millimeters in diameter). In case you alter the 'amount_pencils' variant in openscad you can place how many pencils to hold as well as the width of the holder adapts appropriately.
You can preview the stand with the pencils in it also. Make sure that the pencils do not attempt to take the same space!