SRA4

The SRA4 paper size is the smallest format in the ISO 217 series of supplementary raw, untrimmed paper sizes. It measures 225 mm x 320 mm, giving it a surface area of approximately 0.072 square meters. The SRA designation refers to 'supplementary raw format A', meaning it is oversized from the standard A4 dimensions of 210 mm x 297 mm. As the smallest SRA, it still provides generous bleed allowance for printing projects needing an oversized raw sheet. Typical applications include oversized letterheads, flyers, invitations, coupons, and compact brochures. After printing, SRA4 sheets are often trimmed down to A4 size for binding or use. The efficient 1:√2 aspect ratio enables easy printing of 8 pages on a single SRA4 sheet. As part of the ISO 217 standard finalized in 1975, SRA4 was established as a supplementary untrimmed format. In summary, at 225 x 320 mm, SRA4 serves as a handy oversized sheet for smaller printing jobs requiring generous bleed capacity.