Nuburi Office Supply Brand Business Paper. Nuburi's A5 Size premium 80 GSM paper is ideal for work or play. Home or office. It's a premium business paper you'd select for all your most important legal documents. It's ideal for items such as forms and direct mail. Its consistently smooth printing surface makes for impressive flyers and handouts that pop. Add a splash of color to your important printouts to make a lasting impression. Your satisfaction if guaranteed. Return if not 100% satisfied.