B0 paper is part of the ISO 216 standard, and is commonly used for posters and enlarged photos. B0 is used everywhere except for North America and parts of Latin America. The size of B0 paper measures 1000 x 1414 millimeters. It is the largest sized paper in the B series of paper. All B sized paper have the same aspect ratio. This means that when cut or folded in half widthways, the halves also have the same aspect ratio. So cutting B0 paper in half will produce two B1 sized papers. Cutting a B1 in half will produce two B2 sized papers, and so on.