RA and SRA series
of ISO paper sizes

See also: ISO paper sizes, history and rationale; A series of ISO paper sizes; B series of ISO paper sizes (envelopes); C series of ISO paper sizes; Japanese paper sizes.

The RA and SRA series specify the sizes of untrimmed paper used by printers. Conceptually RA0 has an area of 1.05 square meters and SRA0 an area of 1.15 square meters, but their dimensions have been rounded to the nearest centimeter.

RA Series of Paper Sizes
Size Dimensions
in millimeters
RA0 860 by 1220
RA1 610 by 860
RA2 430 by 610
RA3 305 by 430
RA4 215 by 305

 

SRA Series of Paper Sizes
Size Dimensions
in millimeters
SRA0 900 by 1280
SRA1 640 by 900
SRA2 450 by 640
SRA3 320 by 450
SRA4 225 by 320

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Last revised: 11 August 2004.