PAPER SIZES(ISO)

ISO PAPER SIZES

The Series A is used for Standard Printing and Stationery. The Series B is used for Posters, Wall-Charts etc.

A SERIES	mm X mm	Inch X Inch	B SERIES	mm X mm	Inch X Inch
A0	841 X 1189	33.11 X 46.81	B0	1000 X 1414	39.37 X 55.67
A1	594 X 841	23.39 X 33.11	B1	707 X 1000	27.83X 39.37
A2	420 X 594	16.54 X 23.39	B2	500 X 707	19.68 X 27.83
A3	297 X 420	11.69 X 16.54	B3	353 X 500	13.90 X 19.68
A4	210 X 297	8.27 X 11.69	B4	250 X 353	9.84 X 13.90
A5	148 X 210	5.83 X 8.27	B5	176 X 250	6.93 X 9.84
A6	105 X 148	4.13 X 5.83	B6	125 X 176	4.92 X 6.93
A7	74 X 105	2.91 X 4.13	B7	88 X 125	3.46 X 4.92
A8	52 X 74	2.05 X 2.91	B8	62 X 88	2.44 X 3.46
A9	37 X 52	1.46 X 2.05	B9	44 X 62	1.73 X 2.44
A10	26 X 37	1.02 X 1.46	B10	31 X 44	1.22 X 1.73

Area of A0 = 1 Square meter A0/A1 = AI/A2 = A2/A3 ...........A9/A10 = 2 Length = 1.414 * Width Width of An = 2^(-1/4-n/2) and Height = 2^(1/4-n/2) Area of B0 = 1.414 Square meter B0/B1 = B1/B2 = B2/B3 ............B9/B10 = 2 B0/A0 = B1/A1 = B2/A2 ..........B10/A10 Width of Bn = 2^(-n/2) and Height = 2^(1/2-n/2) The C series is used for folders, post cards and envelopes. C series envelope is suitable to insert A series sizes.

C SERIES	mm X mm	Inch X Inch	Japanese B Series	mm X mm	Inch X Inch
C0	917X1297	36.10X51.06	B0	1030 x 1456	40.55x57.32
C1	648X917	25.53X36.10	B1	728 x 1030	28.66x40.55=
C2	458X648	18.05X25.53	B2	515x728	20.27x28.66
C3	324X458	25.53X9.02	B3	364x515	14.33x20.27
C4	229X324	9.02X12.76	B4	257x364	10.13x14.33
C5	162X229	6.38X9.02	B5	182x257	7.16x10.13
C6	114X162	4.51X6.38	B6	128x182	5.06x7.16
C7	81X114	3.19X4.51	B7	91x128	3.58x5.06
C8	57X81	2.25X3.19	B8	64x91	2.53x3.58
C9	40X57	1.59X2.25	B9	45x64	1.79x2.53
C10	28X40	1.12X1.59	B10	32x45	1.26x1.79

Width of Cn = 2^(-1/8-n/2) and Height = 2^(3/8-n/2)

The allowed tolerances are ±1.5 mm for dimensions up to 150 mm, ±2 mm for dimensions above 150 mm up to 600 mm, and ±3 mm for dimensions above 600 mm.

The A, B & C series are trimmed paper sizes. ISO also define format series RA and SRA for untrimmed raw paper, where SRA stands for 'supplementary raw format A'. These formats are only slightly larger than the corresponding A series formats. Sheets in these formats are  cut to the end format after binding. The ISO RA0 format has an area of 1.05 m² and the ISO SRA0 format has an area of 1.15 m². These formats also follow the sqrt(2)-ratio and half-area rule, but the dimensions of the start format have been rounded to the full centimeter. The common untrimmed paper formats that printers order from the paper manufacturers are

RA SERIES	mm X mm	Inch X Inch	SRA SERIES	mm X mm	Inch X Inch
RA0	860X1220	33.86X48.03	SRA0	900X1280	35.43 X 50.39
RA1	610X860	24.01X33.86	SRA1	640X900	25.19X35.43
RA2	430X610	16.93X24.01	SRA2	450X640	17.71X25.19
RA3	305X430	12.00X16.93	SRA3	320X450	12.59X17.71
RA4	215X305	8.46X12.00	SRA4	225X320	8.85X12.59