This is a pretty basic dice tray, print in place. It can be resized. The original model is a bit big, but it works fine for your regular polyhedral dice set. It fit's 7 dice. It's a project I made learning how to 3D model, so it's just a small thing. It was one of the first things I printed on  my filament printer.

I made the dice in the photo. They're a standard sized set of sharp edge dice made from resin.

I added a brim because my plate is pretty slippery and it sucks if it slips mid print and you have to restart.