Compare 12 Dimensions
Compare 12 size (US Envelope Paper Sizes) side-by-side with other international formats and reference objects.
Paper Sizing Converters
12
121 mm × 279 mm
121 mm
Letter
216 mm × 279 mm
216 mm
Credit Card
86 mm
Aspect Ratio
1 : 2.31
Primary format (12). Comparison aspect ratio is 1 : 1.29.
Digital Output Pixels
1429 px × 3295 px
300 DPI