This pencil organizer that's also a giant functional nut and bolt – size M80, to be exact.
Interior dimensions: 69mm (diameter) x 107mm (height)
External dimensions (WxDxH): 100mm x 114mm x 110mm
I found that this was a nice size, both visually and practically.
This is also available on PrusaPrinters.
organizer-bolt.stl | 2.3MB | |
organizer-nut-looser.stl | 539.5KB | |
organizer-nut.stl | 541.2KB |