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Dimensions Of Paper Sizes Guide

Dimensions Of A Paper Sizes
Dimensions Of B Paper Sizes
Dimensions Of C Envelope Sizes
Dimensions Of RA & SRA Untrimmed Sizes
Newspaper Sizes
Postcard Sizes
US Paper Sizes
British Imperial Paper Sizes
Paper Size Scale & Magification Factors
Portrait & Landscape Paper
Paper Stock Types
Paper Quantities - Quire, Ream, Bundle, Bale & Pallet
What Is The Weight Of A Sheet Of Paper?
US to UK & International Paper Weights
Paper Weights
Paper Whiteness, Brightness & Shade
Dimensions US & North American Envlope Sizes
English Uncut Printing, Book & Drawing Paper Sizes
A4, Foolscap, Letter & Legal Paper Size Comparison

 

Dimensions Of RA & SRA Series Untrimmed Paper Sizes


The RA and SRA paper formats are defined by ISO 217 "Paper - Untrimmed Sizes" and cover untrimmed raw paper for commercial printing. The RA and SRA sizes are slightly larger than the corresponding A series sizes to allow for bleed on printed material that will be later trimmed to size, often for bound publication.

RA stands for "raw format A" and is conceptually defined as being 105% of the A series size, thus as A0 has an area of 1 square metre RA0 has an area of 1.05 square metres. SRA stands for "supplementary raw format A" and is conceptually defined as being 115% of the A series size, so a sheet of SRA0 paper has an area of 1.15 square metres. In reality the sizes for RA0, RA1, RA2, SRA0, SRA1 and SRA2 are rounded to the nearest centimetre and sizes for RA3, RA4, SRA3 and SRA4 are rounded to the nearest half centimetre.

RA Series Paper Sizes Chart

RA Series Paper Sizes Chart

Table of RA Untrimmed Paper Sizes RA0 to RA4

Size Height x Width (mm) Height x Width (in)
RA0 1220 x 860 mm 48.0 x 33.9 in
RA1 860 x 610 mm 33.9 x 24.0 in
RA2 610 x 430 mm 24.0 x 16.9 in
RA3 430 x 305 mm 16.9 x 12.0 in
RA4 305 x 215 mm 12.0 x 8.5 in

SRA Series Paper Sizes Chart

SRA Series Paper Sizes Chart

Table of SRA Untrimmed Paper Sizes SRA0 to SRA4

Size Height x Width (mm) Height x Width (in)
SRA0 1280 x 900 mm 50.4 x 35.4 in
SRA1 900 x 640 mm 35.4 x 25.2 in
SRA2 640 x 450 mm 25.2 x 17.7 in
SRA3 450 x 320 mm 17.7 x 12.6 in
SRA4 320 x 225 mm 12.6 x 8.9 in

To obtain paper sizes in centimetres, convert mm values to cm by dividing by 10.

The aspect ratio (the ratio of the width to the height) of the RA sheets is 1:root 2 (1:1.4142) as for the A series sheets.

Note: Unlike the US untrimmed paper sizes, the RA and SRA paper sizes do not form any part of the calculation of paper weight.

See the following link for Uncut English Paper Sizes from before the introduction of ISO 216.