PAPER SIZES including Business Cards

ISO Standard
	Millimetres	Inches (Nearest Fraction)	Decimal Inches
A0	841  x  1189	33 1/8  x  46 3/4	33.11 x 46.81
A1	594  x  841	23 3/8  x  33 1/8	23.39  x  33.11
A2	420  x  594	16 1/2  x  23 3/8	16.54  x  23.39
A3	297  x  420	11 3/4  x  16 1/2	11.69  x  16.54
A4	210  x  297	8 1/4  x  11 3/4	8.27  x  11.69
A5	148  x  210	5 7/8  x  8 1/4	5.83  x  8.27
A6	105 x  148	4 1/8  x  5 1/8	4.13  x  5.83
A7	74  x  105	2 7/8  x  4 1/8	2.91  x  4.13
B5	182  x 257	10 1/4 x 7 11/64	10.12 x 7.17
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American
	Millimetres	Inches
Letter	216  x 279	8 1/2  x 11
Legal	216  x 356	8 1/2  x 14
Executive	184  x 267	10 1/2  x 7 1/2
Foolscap	203  x 330	13  x 8
Quarto	203  x 254	8  x  10
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Envelope Sizes
	Millimetres	Inches
DL	110  x 220	4 5/16  x 8 1/16
DL can accomodate an A4 sheet folded in three or an A5 sheet folded lengthwise in half
C4	229  x 324	9  x 12 3/4
C4 is designed to take an unfolded sheet of A4 paper or an A3 sheet folded in half
C5	162  x 229	6 3/8  x 9
C5 takes an A5 sheet unfolded or an A4 sheet folded in half
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Personal Calling Card Sizes
	Millimetres	Inches
International Standard Size	85.60 × 53.98	3.37 x 2 1/8
United States	89  x 51	3 1/2 x 2
UK	85 x 55	3.346 × 2.165
Japan	91  x 55	5.58  x 2.17
Notes: Cards cut to A8 paper size can still sometimes be found In Victorian times a Visiting Card would vary between 3 3/8" x 2 1/2" and 2 1/4" X 1 3/8". The size and use of such cards was very dependent on Gender, Marital Status and other factors. The specification for International cards is ISO 7810 ID-1, this is the same dimensions as a standard credit card.
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Folio, Quarto and Octavio: These are paper size terms indicating half-size, quarter size and eighth size respectively.

Foolscap: The reason why Foolscap is so called is that for several centuries many papermakers produced paper of this size with the watermark of a Jester's head. Strictly speaking what we normally refer to as Foolscap should be called Foolscap Folio. Foolscap at 81/2 X 131/2 is only slightly smaller than the US 'Legal' size. Foolscap is a lot less common in the countries where it was mainly in use; Europe, the UK and the English speaking nations excepting the USA.

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