This is an easy print with no support necessary. This print was originally made for Sharpies but I'm sure other writing utensils would work, the length of the space is 139mm (5.45in). I have also included a single marker organizer file if you are looking to make a custom count organizer or looking to scale for other things.
This is my first post and model! Let me know if anything is wrong or if I can fix anything to make it even better, remixes are welcomed!