This is a simple dice rolling tray, complete with a slot that can comfortably fit a set of polyhedral dice.
Measures 190.5mm x 140mm x 41.3mm, with 3.2mm-thick walls. Feel free to scale it up or down as you see fit.
Can be upgraded with rubber feet to prevent it from sliding around, as well as 1-2mm felt for the rolling surface to dampen sound.
Credits:
craiglloyd