SRA1

The SRA1 paper size is the second largest format in the ISO 217 series of supplementary raw, untrimmed paper sizes. It measures 640 mm x 900 mm, giving it a surface area of approximately 0.576 square meters. The SRA designation indicates this is a 'supplementary raw format A' size, oversized from the standard A1 dimensions. SRA1 is substantially larger than A1 which is defined as 594 mm x 841 mm. The sizeable SRA1 format is useful for large format printing applications needing generous bleed capacity. Typical uses include oversized technical drawings, architectural plans, very large posters, expansive maps, and special art prints. After printing, SRA1 sheets are commonly trimmed down to A1 size for binding or display. Like other SRAs, SRA1 originated from the ISO 217 standard finalized in 1975 establishing supplementary untrimmed paper formats. In summary, at 640 x 900 mm, SRA1 serves as an oversized raw sheet for large format printing jobs requiring generous bleed allowance.