RA0

The RA0 paper size is the largest size in the ISO 217 series of raw, untrimmed paper formats. It has dimensions of 860 mm x 1220 mm, giving it a surface area of 1.05 square meters. The RA stand for 'raw format A' indicating it is based on the A series but oversized to allow for bleed during printing. RA0 is slightly larger than the more well known A0 size which is 841 mm x 1189 mm. While not a common everyday paper size, RA0 is useful for commercial printing where bleed and oversized sheets are required. The large dimensions make RA0 well suited for extremely large print projects like outdoor signage, exhibition graphics, and oversized technical drawings. Often after printing on RA0 sheets, the paper is trimmed down to the A0 size for binding or display. The RA0 format originated from the ISO standards body in 1975 as part of the ISO 217 technical standard on paper sizes. Overall, at 1.05 square meters, RA0 provides an oversized raw paper format to facilitate special large format printing jobs.