This is designed specifically to snugly fit the Meilong 3M cube. I tried other designs but they did not fit the Meilong 3M perfectly and it would often fall off if you even looked at it the wrong way.

This was not designed to fit an original Rubix cube and I do not know if it fits well.

Recommendations

Print with a textured bed to increase surface grip, and print with 100% infill for extra weight to lower the center of gravity for better stability.

If you just want to see if it fits your cube first, any settings will do though.