Contents 1 Overview 2 Tolerances 3 Other ISO paper standards 4 External links

Overview 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 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 is intended to have a 1 : 2 {\displaystyle 1:{\sqrt {2}}} aspect ratio but the dimensions of the start format have been rounded to whole centimetres. For example, the RA0 format has been rounded to 860 mm × 1220 mm from the theoretical dimensions 1.05 ⋅ 2 − 1 4 m × 1.05 ⋅ 2 1 4 m ≈ 861.7 m m × 1218.6 m m {\displaystyle {\sqrt {1.05}}\cdot 2^{-{\frac {1}{4}}}\mathrm {m} \times {\sqrt {1.05}}\cdot 2^{\frac {1}{4}}\mathrm {m} \approx 861.7\mathrm {mm} \times 1218.6\mathrm {mm} } . The resulting real ratios are: 43 : 61 ≈ 1 : 1.4186 {\displaystyle 43:61\approx 1:1.4186} for RA0, RA2, RA4; 61 : 86 ≈ 1 : 1.4098 {\displaystyle 61:86\approx 1:1.4098} for RA1, RA3; 45 : 64 ≈ 1 : 1.4222 {\displaystyle 45:64\approx 1:1.4222} for SRA0, SRA2, SRA4; 32 : 45 = 1 : 1.40625 {\displaystyle 32:45=1:1.40625} for SRA1, SRA3. The sizes of the RA series are also slightly larger than corresponding inch-based US sizes specified in ANSI/ASME Y14.1, e.g. RA4 is roughly equivalent to 8½ in × 12 in and ANSI A (alias US Letter) is defined as 8½ in × 11 in.

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 v t e 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 1989 2014 2015 2022 2047 2108 2145 2146 2240 2281 2709 2711 2788 2848 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 9899 9945 9984 9985 9995 10000–19999 10005 10006 10007 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 13450 13485 13490 13567 13568 13584 13616 14000 14031 14224 14289 14396 14443 14496 -2 -3 -6 -10 -11 -12 -14 -17 -20 14644 14649 14651 14698 14750 14764 14882 14971 15022 15189 15288 15291 15292 15398 15408 15444 -3 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 17100 17203 17369 17442 17799 18000 18004 18014 18245 18629 18916 19005 19011 19092 (-1 -2) 19114 19115 19125 19136 19439 19500 19501 19502 19503 19505 19506 19507 19508 19509 19510 19600:2014 19752 19757 19770 19775-1 19794-5 19831 20000+ 20000 20022 20121 20400 21000 21047 21500 21827:2002 22000 23270 23271 23360 24517 24613 24617 24707 25178 25964 26000 26300 26324 27000 series 27000 27001 27002 27006 27729 28000 29110 29148 29199-2 29500 30170 31000 32000 38500 40500 42010 55000 80000 -1 -2 -3 Category Retrieved from "https://en.wikipedia.org/w/index.php?title=ISO_217&oldid=801499488" Categories: ISO standardsStationeryMetrication