The conceptual 'OO' ruler as a utensil for designers to use when looking to streamline their measurement capabilities.
Titled the OO for the two circular discs at one end of the ruler, piece of stationery is capable of measuring linear as well as non-linear surfaces, up to 100 centimetres. Using a clever gear system and two marked rolling-discs, the OO ruler can be rolled on surfaces, with a set of windows depicting the measurement based on how much the discs roll. The lower roller covers the millimetres, while the upper takes care of the centimetres, resetting every 100 centimetres, or one meter.
Perfect for rolling down surfaces, the OO helps capture linear as well as non-linear measurements, while its straight-edge scale can be used as a conventional ruler too.