The ISO 217:1995 standard defines the RA and SRA paper formats. These paper series are untrimmed raw paper. RA stands for “raw format A” and SRA stands for “supplementary raw format A”. The RA and SRA formats are slightly larger than the corresponding A series formats. These paper sheets will after printing and binding be cut to the match the A format.
- The ISO A0 format has an area of 1.00 m²
- The ISO RA0 format has an area of 1.05 m²
- The ISO SRA0 format has an area of 1.15 m²
| RA | Series Formats | SRA | Series Formats |
|---|---|---|---|
| RA0 | 860 × 1220 | SRA0 | 900 × 1280 |
| RA1 | 610 × 860 | SRA1 | 640 × 900 |
| RA2 | 430 × 610 | SRA2 | 450 × 640 |
| RA3 | 305 × 430 | SRA3 | 320 × 450 |
| RA4 | 215 × 305 | SRA4 | 225 × 320 |
Tolerances
Paper in the RA and SRA series format has a <math>1:\sqrt{2}</math> aspect ratio but the dimensions of the start format have been rounded to the full centimeter
Other ISO paper standards
- ISO 216:1975, defines two series of paper sizes: A and B
- ISO 269:1985, defines a C series for envelopes
- ISO 217:1995, defines two untrimmed series of raw paper sizes: RA and a SRA.
External links
- International standard paper sizes: ISO 216 details and rationale
- ISO 216 at iso.org
- ISO 217 at iso.org
- ISO 269 at iso.org
