The ISO-269 standard specifies the following:
Format A B C
Size mm × mm in × in mm × mm in × in mm × mm
in × in
0 841 × 1189 33.1 × 46.8 1000 × 1414 39.4 × 55.7 917 ×
1297 36.1 × 51.1
1 594 × 841 23.4 × 33.1 707 × 1000 27.8 × 39.4 648 ×
917 25.5 × 36.1
2 420 × 594 16.5 × 23.4 500 × 707 19.7 × 27.8 458 ×
648 18.0 × 25.5
3 297 × 420 11.7 × 16.5 353 × 500 13.9 × 19.7 324 ×
458 12.8 × 18.0
4 210 × 297 8.27 × 11.7 250 × 353 9.84 × 13.9 229 ×
324 9.02 × 12.8
5 148 × 210 5.83 × 8.27 176 × 250 6.93 × 9.84 162 ×
229 6.38 × 9.02
6 105 × 148 4.13 × 5.83 125 × 176 4.92 × 6.93 114 ×
162 4.49 × 6.38
7 74 × 105 2.91 × 4.13 88 × 125 3.46 × 4.92 81 ×
114 3.19 × 4.49
8 52 × 74 2.05 × 2.91 62 × 88 2.44 × 3.46 57 × 81
2.24 × 3.19
9 37 × 52 1.46 × 2.05 44 × 62 1.73 × 2.44 40 × 57
1.57 × 2.24
10 26 × 37 1.02 × 1.46 31 × 44 1.22 × 1.73 28 × 40
1.10 × 1.57
All aspect ratios are 1: root2 (dividing A4 en 2 pieces gives A5)
The B sizes are the geometric mean between the A sizes (this means that
enlargement from A4 to B4 is the same enlargement as B4 to A3)
The same counts for the C sizes.
C-sizes re used for envelopes where an A4 letter fits in a C4 envelope, of if
folded once over the long side it fits in a C5 envelope.
Only in the US, Canada and Mexico different sizes are used:
Size Width x Height Width x Height) Aspect Ratio
Letter 216 x 279 mm 8.5 x 11.0 in 1:1.2941
Legal 216 x 356 mm 8.5 x 14.0 in 1:1.6471
Junior Legal 127 x 203 mm 5.0 x 8.0 in 1:1.6000
Ledger/Tabloid 279 x 432 mm 11.0 x 17.0 in 1:1.5455
There are ANSI standards size A through E where each next size doubles the
short smaller side, staring at size A (which is letter).
So US B size is 11 x 17 in.
Theres id a nice overview on wiki to be found here:
http://en.wikipedia.org/wiki/Paper_size
Rob.
Op 26 jul. 2014, om 16:54 heeft Mark Bourne het volgende geschreven:
>
>
> Kracked_P_P---webmaster wrote:
>> As for your description of A-size - - - 8.5 x 11 inches is not an A
>> size that I have heard of. It is US Letter. I have never seen any
>> reference that US Letter described as "A" size. The closest is A4, but
>> A4 is a little narrower and a little taller.
>>
>> B is 11x17 inches - also called Tabloid.
>> Super B is 13x19 inches
>>
>> JB4 - 257x364 mm
>> B5 - 176x250 mm
>> JB5 - 182x257 mm
>>
>> A6 - 105x148 mm
>> A5 - 148x210
>> A4 - 210x297
>> A3 - 297x420
>> A3+ - 330x483 mm
>>
>> These sizes are according to my HP Officejet 7000 wide format printer.
>> Since it does not print larger than Super B, I do not know the actual
>> inches for C or E sizes. [except C6 "Envelope" - 114x162 mm]
>
> http://www.papersizes.org/ is quite handy for looking up paper sizes. It also
> explains how the ISO (A4 etc.) sizes are actually defined - e.g. A0 has an
> area of 1 square metre, and aspect ratio of 1:sqrt(2) (which gives it the
> property that cutting a page in half along it's long edge results in a
> smaller page of the same aspect ratio), then each subsequent A-series size is
> derived by cutting the previous size in half.
>
> The US ANSI A, B, C, D and E sizes are not related to the ISO A-, B- and
> C-series sizes. So ANSI A is nothing to do with ISO A4 (although it happens
> to be very roughly the same size), and ANSI C nothing to do with ISO C6.
>
> Mark.
>
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