Compare C3 Dimensions
Compare C3 size (International Envelope Paper Sizes) side-by-side with other international formats and reference objects.
Paper Sizing Converters
C3
324 mm × 458 mm
324 mm
Letter
216 mm × 279 mm
216 mm
Credit Card
86 mm
Aspect Ratio
1 : 1.41 (√2)
Primary format (C3). Comparison aspect ratio is 1 : 1.29.
Digital Output Pixels
3827 px × 5409 px
300 DPI