Warmaster Hero Bases

20mm and 25mm Round Bases. The base is beveled and has a slot for a miniature on top and a slot for a 7mm wide, 0.5mm thick washer underneath.

This base is the same height as my Warmaster bases and is intended for characters.

These washers will fit perfectly: https://www.amazon.com/gp/product/B000H5ZU7Q/

You can print it flat, but for best results, raise it up and print at 45 degrees