Paper comes in a wide array of sizes but the two most used are standard and SRA. This short piece will help explain the language of paper and understand which one suits your specific needs.
Paper Size
Common UK Sizes
The International Standard (ISO 216) for scaling the paper sizes is fantastically simple. The length of the smaller size equals the width of the next largest sheet so that when folded in half, the paper has the same area as the smaller size down:
A0 – 1189 x 841mm
A1 – 594 x 841mm
A2 – 594 x 420mm
A3 – 297 x 420mm
A4 – 297 x 210mm
A5 – 148 x 210mm
A6 – 148 x 105mm
A7 – 74 x 105mm
SRA Series
Used by printers as the larger sized SRA series which is standardised by ISO 217. This system allows for extra space on the side of the paper which allows for bleed from to the print process.
SRA0 900mm × 1280mm
SRA1 640mm × 900mm
SRA2 450mm × 640mm
SRA3 320mm × 450mm
SRA4 225mm × 320mm