Back to C Envelope Series

C9 Specifications

*Width ()**	40 mm
*Height ()**	57 mm
Standard	C Series (Envelope)
Half-Size	A C10 envelope is half its size
Envelope	Can fit an A9 sheet of paper

(*) Subject to orientation

Click the diagram to see an animation representing the size relationship between C9 and C10 envelopes.

40mm

C9

C10

28mm (C10)

57mm (C9)

Compatible Printers

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Tools

DPI Calculator

Calculate the optimal DPI for printing on C9

Dimensions

Unit	Width	Height
Millimeters (mm)	40	57
Centimeters (cm)	4.0	5.7
Meters (m)	0.04	0.06
Inches (in)	1.575	2.244
Points (pt)	113.39	161.57
Picas (pc)	9.45	13.46
Pixels @ 72 DPI	113	162
Pixels @ 96 DPI	151	215
Pixels @ 300 DPI	472	673