A simple mobius ring formed with a square profile and a 180 degree twist. The square profile has 10mm sides.
This model is designed for full colour printed sandstone, so can have whatever colour text on whatever colour background you wish. The text can be upto 120 characters (60 characters per 'side') and can be in many different fonts.
Want images on there... no problem... just make sure the images would be visable at 10mm tall and within the print resolution for full colour sandstone (600x540 DPI)