Guide to Card Sizes, Weight & Thickness
SRA2 = 640 x 450mm, A2 = 594 x 420mm, A3 = 420 x 297mm, A4 = 297 x 210mm.
Card weight is measured in gsm, thickness in microns (1 micron = 0.001mm). As a rough guide: 230 microns = 180gsm, 380 microns = 290gsm, 500 microns = 400gsm.
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