The term is used to refer to the Border Design found in Dimasa traditional cloths. It includes geometrical, dotted, plants, animals, flowers, etc. Each of the Riku Dima has its own unique name.
One of the oldest of Dimasa primordial verses refers to myth of Dilaobra-Sangibra in which it is narrated how their ancestors met at the confluence of river named Dilao-Sangi to formulate all the governing principles of Dimasa socio-religious experience.
