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C1 Specifications

Width (*) 648 mm
Height (*) 917 mm
Standard C Series (Envelope)
Half-Size A C2 envelope is half its size
Envelope

Can fit an A1 sheet of paper

(*) Subject to orientation

Click the diagram to see an animation representing the size relationship between C1 and C2 envelopes.

648mm

C1

C2

458mm (C2)
917mm (C1)

Compatible Printers

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Tools

DPI Calculator

Calculate the optimal DPI for printing on C1

Dimensions

UnitWidthHeight
Millimeters (mm)648917
Centimeters (cm)64.891.7
Meters (m)0.650.92
Inches (in)25.51236.102
Points (pt)1836.852599.37
Picas (pc)153.07216.61
Pixels @ 72 DPI18372599
Pixels @ 96 DPI24493466
Pixels @ 300 DPI765410831