RA4

The RA4 paper size is the smallest format in the ISO 217 series of raw, untrimmed paper sizes. It measures 215 mm x 305 mm, giving it a surface area of approximately 0.0656 square meters. The RA designation refers to 'raw format A', meaning it is oversized from the standard A4 size to allow bleed printing. RA4 is slightly larger than A4 which is defined as 210 mm x 297 mm. As the smallest RA, it sees use for printing projects needing bleed allowance but on a smaller scale. Typical applications for RA4 include letterheads, invitations, flyers, coupons, and compact brochures. After printing, the RA4 sheets are commonly trimmed down to A4 size for binding or distribution. The efficient 1:√2 aspect ratio enables easy printing of 8 pages on a single RA4 sheet. Like other RAs, RA4 was established by the ISO in 1975 as part of the ISO 217 standard on untrimmed paper formats. In summary, measuring 215 x 305 mm, RA4 serves as a handy oversized sheet for smaller printing work requiring bleed capacity.