Rollbe, created by Work of Mind Inc., is a reinvention of the design and usability of the rulers and measuring tools we have all used at some point in our lives. The innovation lies in its super-compact design.
As you can see in the image, it is a simple metal disc with engraved measuring points. Its use is as simple as counting how many complete turns it makes as it rolls.
Rollbe comes in two sizes: A smaller, 4-inch or 10 cm size, and a larger, 8-inch or 20 cm size.