Modeled a large d20 to print just for fun. Actually works quite well. I would avoid rolling it on any surface you don't want to damage (roll it on carpet).

There are two models. One large, one not so large.
The big one has been affectionally named 'The Chonker' while I call the smaller one 'The Softball Special'

Printed on CR6SE with PLA
Supports needed for the some of the embossed numbers

Print Settings

Printer Brand:

Creality

Rafts: 

No

Supports:

Yes

Resolution: 

0.2mm

Infill:

7%

Filament: MatterHackers PLA
 

Notes: 

Gyroid infill
Printed with 1.2mm uniform skin (top, bottom, walls)

Category: Dice