Nuburi Office Supply brand premium printer paper. Nuburi's 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 documents. B4 is the size of two A4 pieces of paper. Its large size makes it great for Large Scale Printouts, Color Diagrams, Flow Charts, hierarchy charts, Posters and it's Great for Drawing Also. It's 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.