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description=An explanation of the ISO 216 paper size format standard, including definition of A series paper sizes (A3, A4, A5 etc);

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sizes (83), the (80), paper (65), and (35), for (17), iso (16), #series (15), are (13), all (12), see (12), size (12), envelope (12), #standard (11), this (8), with (7), weights (7), root (7), which (6), more (6), that (6), geometric (6), were (5), between (5), based (5), weight (5), some (5), letter (5), square (5), envelopes (5), ratio (5), mean (5), 875 (5), 125 (5), use (4), sides (4), portrait (4), landscape (4), same (4), also (4), basis (4), sheets (4), sheet (4), ansi (4), arch (4), poster (4), billboard (4), legal (4), tabloid (4), being (4), american (4), defined (4), sra (4), folded (4), half (4), aspect (4), length (4), width (4), broadsheet (4), 625 (4), 216 (3), variety (3), imperial (3), viewed (3), shorter (3), shade (3), whiteness (3), brightness (3), definition (3), stock (3), grammage (3), link (3), a10 (3), following (3), there (3), these (3), have (3), area (3), areas (3), other (3), two (3), useful (3), scale (3), factor (3), magnification (3), untrimmed (3), formats (3), will (3), hold (3), parallel (3), each (3), overview (3), 500 (3), canadian (3), 420 (3), 594 (3), 375 (3), postcard (3), 148 (3), 105 (3), around (2), common (2), countries (2), had (2), been (2), british (2), used (2), top (2), bottom (2), said (2), not (2), different (2), defines (2), tables (2), conversions (2), types (2), make (2), your (2), down (2), click (2), number (2), ream (2), quire (2), reams (2), posters (2), ledger (2), information (2), metre (2), divided (2), here (2), properties (2), reducing (2), enlarging (2), such (2), convert (2), full (2), printing (2), covered (2), has (2), when (2), unfolded (2), its (2), introduced (2), suitable (2), one (2), note (2), numbers (2), those (2), standards (2), order (2), rationale (2), behind (2), 280 (2), 430 (2), 260 (2), 578 (2), newspaper (2), minimum (2), maximum (2), gov (2), 114 (2), 162 (2), 229 (2), 324 (2), 458 (2), 648 (2), 917 (2), 176 (2), 250 (2), 353 (2), 707 (2), 1000 (2), 210 (2), 297 (2), 841 (2), international (2), units (2), obsolete (2), 2026, advertising, rates, contact, cookies, privacy, before, introduction, many, world, part, empire, japan, traditional, across, european, historical, can, depending, how, you, look, longer, white, measures, discriminate, various, shades, 536, determine, thickness, north, america, entirely, provided, type, selections, drop, boxes, find, out, selection, 2a0, 4a0, 640gsm, 540gsm, 350gsm, 330gsm, 320gsm, 300gsm, 270gsm, 260gsm, 250gsm, 240gsm, 200gsm, 190gsm, 180gsm, 170gsm, 160gsm, 120gsm, 110gsm, 100gsm, 90gsm, 80gsm, 75gsm, 70gsm, pounds, ounces, kilograms, grams, bale, bundle, calculator, billboards, others, specific, forms, expecially, true, movie, links, united, states, their, own, most, architectural, again, both, extended, expediency, additions, then, power, print, photocopying, needed, from, covers, factors, raw, commercial, 217, slightly, larger, than, corresponding, allow, ink, bleed, during, process, definitions, sizing, neat, dealing, once, shortest, piece, twice, define, leads, nicely, holds, benefit, using, scales, product, 6x4, who, interested, explains, detail, means, but, provide, requirements, where, isn, take, into, account, explain, going, need, bit, maths, extensions, last, item, because, doesn, always, give, whole, rounded, nearest, millimetre, subsequent, cut, 4142, formal, mathematics, feature, previous, lengths, system, allows, applications, images, without, any, cutoff, margins, folding, booklet, next, news, 350, ciner, compact, 413, tall, tab, 368, 320, 475, swiss, 315, 470, beliner, wall, street, journal, new, york, times, 410, 381, 597, 140, 235, 120, 15½, 14½, 13½, 12½, 10½, catalog, long, willow, diplomat, carr, besselheim, thompson, lady, grey, announcement, office, junior, c10, 1297, b10, 1414, 1189, dimensions, uncut, history, info, about, quires, japanese, foolscap, compared, scaling, menu, explained,

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international paper sizes formats standards explained units mm cm m in menu overview iso standard a b c iso standard a b c a paper sizes b paper sizes c envelope sizes ra sra untrimmed magnification scaling a4 letter foolscap compared american sizes american sizes us paper sizes us envelope sizes canadian paper sizes other sizes other sizes japanese sizes newspaper sizes postcard sizes poster sizes billboard sizes paper weights paper weights weights overview stock types reams quires grammage to basis weight weights of sheets more about paper more info portrait landscape whiteness brightness history of paper obsolete sizes obsolete sizes imperial sizes imperial uncut sizes units mm cm m in international paper sizes formats with dimensions a paper sizes iso a0 841 x 1189 mm a1 594 x 841 mm a2 420 x 594 mm a3 297 x 420 mm a4 210 x 297 mm a5 148 x 210 mm a6 105 x 148 mm a7 74 x 105 mm a8 52 x 74 mm a9 37 x 52 mm a10 26 x 37 mm see all a sizes b paper sizes iso b0 1000 x 1414 mm b1 707 x 1000 mm b2 500 x 707 mm b3 353 x 500 mm b4 250 x 353 mm b5 176 x 250 mm b6 125 x 176 mm b7 88 x 125 mm b8 62 x 88 mm b9 44 x 62 mm b10 31 x 44 mm see all b sizes c envelope sizes iso c0 917 x 1297 mm c1 648 x 917 mm c2 458 x 648 mm c3 324 x 458 mm c4 229 x 324 mm c5 162 x 229 mm c6 114 x 162 mm c7 81 x 114 mm c8 57 x 81 mm c9 40 x 57 mm c10 28 x 40 mm see all c sizes us paper sizes letter 8 5 x 11 0 in legal 8 5 x 14 0 in ledger 17 0 x 11 0 in tabloid 11 0 x 17 0 in half letter 5 5 x 8 5 in gov t letter 8 0 x 10 0 in junior legal 5 0 x 8 0 in gov t legal 8 5 x 13 0 in see all us sizes us ansi paper sizes a 8 5 x 11 0 in b 11 0 x 17 0 in c 17 0 x 22 0 in d 22 0 x 34 0 in e 34 0 x 44 0 in b 13 0 x 19 0 in see all us sizes us arch paper sizes a 9 0 x 12 0 in b 12 0 x 18 0 in c 18 0 x 24 0 in d 24 0 x 36 0 in e 36 0 x 48 0 in e1 30 0 x 42 0 in see all us sizes us office envelope sizes 6¼ 6 0 x 3 5 in 6¾ 6 5 x 3 625 in 7 6 75 x 3 75 in 7¾ 7 5 x 3 875 in 8 8 625 x 3 625 in 9 8 875 x 3 875 in 10 9 5 x 4 125 in 11 10 375 x 4 5 in 12 11 0 x 4 75 in 14 11 5 x 5 0 in 16 12 0 x 6 0 in see all us envelopes us announcement envelope sizes a1 3 625 x 5 125 in a2 lady grey 5 75 x 4 375 in a4 6 25 x 4 25 in a6 thompson s standard 6 5 x 4 75 in a7 besselheim 7 25 x 5 25 in a8 carr s 8 125 x 5 5 in a9 diplomat 8 75 x 5 75 in a10 willow 9 5 x 6 0 in a long 8 875 x 3 875 in see all us envelopes us catalog envelope sizes 1 9 0 x 6 0 in 1¾ 9 5 x 6 5 in 3 10 0 x 7 0 in 6 10 5 x 7 5 in 8 11 25 x 8 25 in 9¾ 11 25 x 8 75 in 10½ 12 0 x 9 0 in 12½ 12 5 x 9 5 in 13½ 13 0 x 10 0 in 14½ 14 5 x 11 5 in 15 15 0 x 10 0 in 15½ 15 5 x 12 0 in see all us envelopes postcard sizes iso maximum 235 x 120 mm iso standard 148 x 105 mm iso minimum 140 x 90 mm us maximum 6 0 x 4 25 in us minimum 5 0 x 3 5 in see all postcard sizes newspaper sizes uk broadsheet 375 x 597 mm us broadsheet 381 x 578 mm au nz broadsheet 420 x 594 mm sa broadsheet 410 x 578 mm new york times 12 0 x 22 0 in wall street journal 12 0 x 22 75 in beliner 315 x 470 mm swiss 320 x 475 mm uk tabloid 280 x 430 mm canadian tabloid 260 x 368 mm canadian tall tab 260 x 413 mm compact 280 x 430 mm ciner 350 x 500 mm see all news paper sizes iso paper sizes standard overview rationale the iso paper size a standard is based on each size being half of the size of the previous one when folded parallel to the shorter lengths this system allows for a variety of useful applications such as the enlarging and reducing of images without any cutoff or margins or folding to make a booklet of the next size down the mathematics behind this useful feature is that the sheets have an aspect ratio that s the ratio of the length to the width of the square root of 2 a series paper sizes formal definition the iso 216 definition of the a paper sizes is based on the following basis the length divided by the width is 1 4142 the a0 size has an area of 1 square metre each subsequent size a n is defined as a n 1 cut in half parallel to its shorter sides the standard length and width of each size is rounded to the nearest millimetre note the last item is there because the root 2 aspect ratio doesn t always give a whole number sizes for a series paper a0 a1 a2 a3 a4 a5 a6 a7 and a8 extensions b series paper sizes there are some requirements for paper sizes where the a series isn t suitable and to take these into account the b series paper sizes were introduced in order to explain the rationale behind the b paper sizes we are going to need a bit more maths the b series paper standards are also based around the 1 root 2 aspect ratio but in order to provide sizes not covered by the a series the length and width of size b n are defined as being the geometric mean of size a n and size a n 1 note the geometric mean of two numbers is the square root of the product of those two numbers e g the geometric mean of 6 and 4 is root 6x4 or the square root of 24 for those who are interested this link explains geometric means in more detail the benefit of using the geometric mean is that the magnification factor between a1 and b1 sizes is that same as the one that scales b1 to a0 sizes for b series paper b0 b1 b2 b3 b4 b5 b6 b7 and b8 the c series envelope sizes the c series sizes were introduced to define the sizes of envelopes suitable for the a series paper sizes this is also based on the root 2 aspect ratio and the size of a c n envelope is defined as the geometric mean of paper sizes a n and b n this leads to a c n envelope which nicely holds a sheet of a n paper unfolded this sizing also has some neat properties when dealing with folded paper so a c4 envelope will hold a sheet of a4 paper unfolded a c5 envelope will hold a sheet of a4 paper folded in half once parallel to its shortest sides and a c6 envelope will hold the same piece of paper folded twice sizes for c series envelopes c0 c1 c2 c3 c4 c5 c6 c7 and c8 ra sra untrimmed paper sizes untrimmed raw paper formats for commercial printing are covered by iso 217 which defines ra and sra paper paper sizes these sizes are slightly larger than the corresponding a sizes to allow for ink bleed during the printing process full ra sra definitions here conversions between paper sizes the iso 216 paper sizes have some useful properties for reducing and enlarging in print or photocopying such that the scale factor needed to convert from a3 to a4 at 71 is the same as the scale factor to convert between a4 and a5 a5 and a6 and so on the following link covers full tables of magnification scale factors for a b paper sizes paper size areas the a series paper sizes are defined by the area of a0 being 1 square metre the areas of other sizes are then area of an is 1 divided by two to the power of n more information on areas of standard paper sizes here american paper sizes the united states use their own standard paper sizes letter legal and ledger tabloid being some of the most common there is an ansi standard with sizes a e and architectural paper sizes the arch series again with sizes a e both of these series have been extended for expediency with the additions of ansi b and arch e1 see american paper sizes for more information poster billboard sizes billboards and posters use a variety of sizes some of which are in the standard paper sizes iso ansi and arch others of which are specific to the poster and billboard forms this is expecially true of movie posters click the following links for poster and billboard sizes paper weights weight of sheets reams calculator sheet quire ream bundle bale grams kilograms ounces pounds 70gsm 75gsm 80gsm 90gsm 100gsm 110gsm 120gsm 160gsm 170gsm 180gsm 190gsm 200gsm 240gsm 250gsm 260gsm 270gsm 300gsm 320gsm 330gsm 350gsm 540gsm 640gsm 4a0 2a0 a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 70 make your selections in the drop down boxes to find out the weight for your selection click this link for the number of sheets in a ream or quire iso 536 defines paper weights and grammage which determine the thickness of the paper the us and north america use an entirely different definition for paper weights based on basis weight and stock types tables of conversions between basis weight by stock type and grammage are also provided paper whiteness brightness shade not all paper is the same shade of white and whiteness brightness and shade are different measures used to discriminate between various shades of paper portrait landscape paper paper can be viewed as portrait paper or landscape paper depending on how you look at it viewed with the shorter sides at the top and bottom it is said to be portrait and viewed with the longer sides at the top and bottom it is said to be landscape historical paper sizes before the introduction of iso 216 many paper sizes were in use around the world british imperial paper sizes were common in countries which had been part of the british empire japan had traditional paper sizes and a variety of sizes were used across european countries paper sizes 2026 cookies privacy contact 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