A1 Paper Size is 594 x 841

The A1 paper size is often rounded to 594 x 840 mm. If you need to get an idea of the size of A1 Paper size then get 8 sheets of paper and lay them on the ground 4 across 2 down.
A1 = 8 x a4 / 4 x a3 / 2 x a2s / half an A0

A1 Paper Measurements

Millimeters - 594 x 841 mm
Centimeters - 59.4 x 84.1cm
Inches / Decimal - 23.39 x 33.11 inches     
Inches / Fraction - 23 3/8 x 33 1/8     (closest 16th)
Points - 1684 x 2384 pt
Picas - 140.31 x 198.66

A1 Paper Size for digital images

Pixels at 72 PPi - 1684 x 2384 ppi - 4 million pixels
CMYK  - 15.3 MB
RGB - 11.5 MB
Gray Scale - 3.8 MB
Bitmap - 0.5 MB

Pixels at 150 PPi - 3508 x 4967 ppi -17.4 million pixels
CMYK - 66.5 MB
RGB - 49.9 MB
Gray Scale - 16.6 MB
Bitmap - 2.08 MB

Pixels at 300 PPi - 7016 x 9933 ppi - 69.7 million pixels
CMYK - 265.8 MB
RGB - 199.4 MB
Gray Scale - 66.5 MB
Bitmap - 8.31MB

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To have your A1 design printed take a look at our A1 poster printing page info for photo quality prints

A0 paper size A1 paper size A2 paper size A3 paper size A4 paper size