Information
INTERNATIONAL ENVELOPE C3 measures 458 × 324 mm (18 × 12.8 inch) with an aspect ratio of 1.41, perimeter of 1.56 m, diagonal of 0.56 m and an area of 0.148392 m².
Common query: 458x324 mm, 18x12.8 inches.
International envelopes
DL
220 x 110 mm
8.7 x 4.3 inch
B4
353 x 250 mm
13.9 x 9.8 inch
B5
250 x 176 mm
9.8 x 6.9 inch
B6
176 x 125 mm
6.9 x 4.9 inch
C3
458 x 324 mm
18 x 12.8 inch
C4
324 x 229 mm
12.8 x 9 inch
C5
229 x 162 mm
9 x 6.4 inch
C6/C5
229 x 114 mm
9 x 4.5 inch
C6
162 x 114 mm
6.4 x 4.5 inch
C7/C6
162 x 81 mm
6.4 x 3.2 inch
C7
114 x 81 mm
4.5 x 3.2 inch
E4
400 x 280 mm
15.7 x 11 inch