Basic Super Mario Gold Coin from the games. Designed by me on Tinkercad.
Printing it flat against the bed without supports makes it messy, while with supports makes the supports difficult to remove without the proper tools.
I would recommend either cutting it in half and printing it designs facing upwards and then glueing it together post-print or printing it standing on one side with supports.
Example: Side of the coin that was printer bed face down without supports.
Example: Side of the coin that was printer face down with supports.