Compare C1 Dimensions
Compare C1 size (C Envelope Paper Sizes) side-by-side with other international formats and reference objects.
Paper Sizing Converters
C1
648 mm × 917 mm
648 mm
Letter
216 mm × 279 mm
216 mm
Credit Card
86 mm
Aspect Ratio
1 : 1.41 (√2)
Primary format (C1). Comparison aspect ratio is 1 : 1.29.
Digital Output Pixels
7654 px × 10831 px
300 DPI