SRA3 paper is 450mm x 320mm. Bigger than A3
SRA3 Paper – What Is It?
Orchestra librarians want you to know about parts paper sizes - Scoring Notes
SRA3 Paper – What Is It?
Print Blog - Aura Print
IQ, Converting Paper
Xerox Specialty Paper and Media
PERGRAPHICA®, Uncoated design paper
A4 Size Paper, Standard UK Paper Sizes
sra3 a4 a3 size strong laser
SRA3 Copy Paper
Printer paper in DIN A3+ format - 329 x 483 mm
Color Copy Coated Silk A3 Paper - 170gsm : : Stationery & Office Supplies
Print Blog - Aura Print
Paper Sizes Guide for Direct Mail Marketing