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±1 mm (0.039 in) for dimensions up to 150 mm (5.9 in), ±1.5 mm (0.059 in) for lengths in the range 150 to 600 mm (5.9 to 23.6 in) and; ±2 mm (0.079 in) for any dimension above 600 mm (24 in). There used to be a standard, DIN 198, that was just a table of recommended A series formats for a number of business applications.
Two supplementary standards, ISO 217 and ISO 269, define related paper sizes; the ISO 269 "C" series is commonly listed alongside the A and B sizes. All ISO 216, ISO 217 and ISO 269 paper sizes (except some envelopes) have the same aspect ratio, √ 2:1, within rounding to millimetres. This ratio has the unique property that when cut or folded ...
ANSI Standard Paper Sizes ANSI Paper Size Width x Height (mm) Width x Height (in) Aspect Ratio Closest ISO Size A 216 x 279 8.5 x 11.0 1:1.2941 A4 B 279 x 432 11.0 x 17.0 1:1.5455 A3 C 432 x 559 17.0 x 22.0 1:1.2941 A2 D 559 x 864 22.0 x 34.0 1:1.5455 A1 E 864 x 1118 34.0 x 44.0 1:1.2941 A0
A0, A-0, A 0, or a 0 may refer to: 101 A0 and 103 A0, two versions of the German Heinkel Tourist moped; A0 paper size, an international ISO 216 standard paper size (841 × 1189 mm), which results in an area very close to 1 m 2; A0 highway (Zimbabwe), a highway which orbits Zimbabwe; A0, the lowest A (musical note) note on a standard piano; A0 ...
A size chart illustrating the ANSI sizes. In 1992, the American National Standards Institute adopted ANSI/ASME Y14.1 Decimal Inch Drawing Sheet Size and Format, [1] which defined a regular series of paper sizes based upon the de facto standard 8 + 1 ⁄ 2 in × 11 in "letter" size to which it assigned the designation "ANSI A".
A quire of paper is a measure of paper quantity. The usual meaning is 25 sheets of the same size and quality: 1 ⁄ 20 of a ream of 500 sheets. Quires of 25 sheets are often used for machine-made paper, while quires of 24 sheets are often used for handmade or specialised paper of 480-sheet reams.
Many laser printers can print on both sides of the paper (duplex printing), which is not possible with continuous stationery. Standard perforations are 5/32 inch in diameter (3.96875 mm, sometimes called 4 mm) and are spaced at 1 ⁄ 2 inch (13 mm) center-to-center. Tear-off horizontal perforations at page top/bottom are exactly in-between ...
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 8 + 1 ⁄ 2 in × 12 in (220 mm × 300 mm) and ANSI A (alias US Letter) is defined as 8 + 1 ⁄ 2 in × 11 in (220 mm × 280 mm).