International Paper Sizes
	ISO A-sizes
	The A-sizes are a logical set of paper sizes. The largest size (A0) measures one square meter. The height/width ratio remains constant (1:1.41) for all sizes. This means you get the A1 size by folding an A0 paper in two. Then fold the A1 size in two to get an A2 size paper, and so on... A-sizes are used to define the finished paper size in commercial printing. A4 is used for office documents. A6 is used for postcards.   Millimetres Inches Points   Height Width Height Width Height Width A0 1189 841 46.81 33.11 3370 2384 A1 841 594 33.11 23.39 2384 1684 A2 594 420 23.39 16.54 1684 1190 A3 420 297 16.54 11.69 1190 842 A4 297 210 11.69 8.27 842 595 A5 210 148 8.27 5.83 595 420 A6 148 105 5.83 4.13 420 298 A7 105 74 4.13 2.91 298 209
	ISO B-sizes
	The same logic from the A-sizes also applies for the B-series, except here the starting point was the dimension of one of the sides, which starts at 1 meter. B-sizes are often used for posters.   Millimetres Inches Points   Height Width Height Width Height Width B0 1414 1000 55.67 39.37 4008 2835 B1 1000 707 39.37 27.83 2835 2004 B2 707 500 27.83 19.69. 2004 1417 B3 500 353 19.69 13.90 1417 1001 B4 353 250 13.90 9.84 1001 709 B5 250 176 9.84 6.93 709 499 B6 176 125 6.93 4.92 499 354 B7 125 88 4.92 3.46 354 249 B8 88 62 3.46 2.44 249 176 B9 62 44 2.44 1.73 176 125 B10 44 31 1.73 1.22 125 88
	American paper sizes
	As far as I know, a lot of businesses in the US still rely on the paper sizes below that come with nice names but no apparent logic behind them. In England a similar system was used but they have already seen the light and switched to the A-sizes.   Millimetres Inches Points   Height Width Height Width Height Width Letter 279.4 215.9 11.00 8.50 792 612 Legal 355.6 215.9 14.00 8.50 1008 612 Ledger 431.8 279.4 17.00 11.00 1224 792 Tabloid 279.4 431.8 11.00 17.00 792 1224 Executive 266.7 184.1 10.55 7.25 756 522
	ISO C-sizes
	C-sizes are used for envelopes to match the A-series paper. I have omitted unrealistic sizes like C0 (imagine an envelope measuring 917 by 1297 millimetres).   Millimetres Inches Points   Height Width Height Width Height Width C2 458 648 18.03 25.51 578 1837 C3 324 458 12.76 18.03 919 578 C4 229 324 9.02 12.76 649 919 C5 162 229 6.38 9.02 459 649 C6 114 162 4.49 6.38 323 459
	ISO D-sizes
	I have no idea what D-sizes are used for but the standard is there so it should be mentioned.   Millimetres Inches Points   Height Width Height Width Height Width D0 771 1090 30.35 42.91 2186 3090
	ISO RA & SRA sizes
	These oversized papersizes are used by printers. The dimensions in millimetres are rounded to the nearest value.   Millimetres Inches Points   Height Width Height Width Height Width SRA0 900 1280 35.43 50.39 2551 3628 SRA1 640 900 25.20 35.43 1814 2551 SRA2 450 640 17.72 25.20 1276 1814 SRA3 320 450 12.59? 17.72 907? 1276 SRA4 225 320 8.86? 12.59? 638? 907? RA0 860 1220 33.86 48.03 2438 3458 RA1 610 860 24.02 33.86 1729 2438 RA2 430 610 16.93 24.02 1219 1729
	English paper sizes (writing papers)
	I have no idea whether these definitions are still in use today.   Millimetres Inches Points   Height Width Height Width Height Width Foolscap 419 336 16.50 13.25 1188 954 Small Post 469 368 18.50 14.50 1332 1044 Sheet and 1/3 cap 588 336 22.00 13.25 1584 954 Sheet and 1/2 cap 628 336 24.75 13.25 1782 954 Demy 507 394 20.00 15.50 1440 1116 Large Post 533 419 21.00 16.50 1512 1188 Small medium 558 444 22.00 17.50 1584 1260 Medium 584 457 23.00 18.00 1656 1296 Small Royal 609 482 24.00 19.00 1728 1368 Royal 634 507 25.00 20.00 1800 1440 Imperial 761 559 30.00 22.00 2160 1584
	© 2000 L. Leurs