Iso 217

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. This allows bleed (ink to the edge) on printed material that will be later cut down to size. These paper sheets will after printing and binding be cut to 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

Tolerances

Paper in the RA and SRA series format is intended to have a 1:\sqrt{2} aspect ratio but the dimensions of the start format have been rounded to whole centimetres.

For example, the RA0 format would be \sqrt{1.05}*2^{-0.25} m \times \sqrt{1.05}*2^{0.25} m \approx 861.7 mm \times 1218.6 mm, which has been rounded to 860 mm \times 1220 mm.

The resulting real ratios are:

• 43:61 \approx 1:1.4186 for RA0, RA2, RA4;

• 61:86 \approx 1:1.4098 for RA1, RA3;

• 45:64 \approx 1:1.4222 for SRA0, SRA2, SRA4;

• 32:45 = 1:1.40625 for SRA1, SRA3.

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

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

ISO standards by standard number List of ISO standards / ISO romanizations / IEC standards 1–9999 1 2 3 4 5 6 7 9 16 31 -0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 128 216 217 226 228 233 259 269 302 306 428 518 519 639 -1 -2 -3 -5 -6 646 690 732 764 843 898 965 1000 1004 1007 1073-1 1413 1538 1745 2014 2015 2022 2108 2145 2146 2240 2281 2709 2711 2788 2852 3029 3103 3166 -1 -2 -3 3297 3307 3602 3864 3901 3977 4031 4157 4217 4909 5218 5428 5775 5776 5800 5964 6166 6344 6346 6385 6425 6429 6438 6523 6709 7001 7002 7098 7185 7200 7498 7736 7810 7811 7812 7813 7816 8000 8178 8217 8571 8583 8601 8632 8652 8691 8807 8820-5 8859 -1 -2 -3 -4 -5 -6 -7 -8 -8-I -9 -10 -11 -12 -13 -14 -15 -16 8879 9000/9001 9075 9126 9293 9241 9362 9407 9506 9529 9564 9594 9660 9897 9945 9984 9985 9995 10000–19999 10006 10116 10118-3 10160 10161 10165 10179 10206 10218 10303 -11 -21 -22 -28 -238 10383 10487 10585 10589 10646 10664 10746 10861 10957 10962 10967 11073 11170 11179 11404 11544 11783 11784 11785 11801 11898 11940 (-2) 11941 11941 (TR) 11992 12006 12182 12207 12234-2 13211 -1 -2 13216 13250 13399 13406-2 13407 13450 13485 13490 13567 13568 13584 13616 14000 14031 14224 14289 14396 14443 14496 -2 -3 -6 -10 -11 -12 -14 -17 -20 14644 -1 -2 -3 -4 -5 -6 -7 -8 -9 14649 14651 14698 -2 14750 14882 14971 15022 15189 15288 15291 15292 15408 15444 15445 15438 15504 15511 15686 15693 15706 -2 15707 15897 15919 15924 15926 15926 WIP 15930 16023 16262 16612-2 16750 16949 (TS) 17024 17025 17369 17799 18000 18004 18014 18245 18629 18916 19005 19011 19092 (-1 -2) 19114 19115 19125 19136 19439 19501:2005 19752 19757 19770 19775-1 19794-5 20000+ 20000 20022 20121 21000 21047 21500 21827:2002 22000 23270 23271 23360 24517 24613 24617 24707 25178 25964 26000 26300 26324 27000 series 27000 27001:2005 27001:2013 27002 27003 27004 27005 27006 27007 27729 27799 28000 29110 29199-2 29500 31000 32000 38500 42010 80000 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 Categories ISO standards ISO 639 ISO 3166 ISO / IEC standards OSI protocols