Here is a six sided dice that was designed in Fusion 360, the center hole is 0.75 mm wide as a result the resolution may be too small for FDM printers and should be printed on a resin printer.
3MF File is included in the .zip folder, also included .obj files for resin printing at 0.5 inches and 0.34 inches.
The author hasn't provided the model origin yet.