C3 Paper Size

C3 is a format in the C series paper, and the C series paper is a series of commonly used papers in the ISO 216 international paper standard, the C series formats are geometric means between the B series and A series formats with the same number (e.g., C2 is the geometric mean between B2 and A2), it mainly used for envelopes. The width of the C3 paper is 324mm(12.8 inches) and the height is 458mm(18 inches).

Format/name C3
Width(mm) 324 mm
Width(in) 12.8 inches
Height(mm) 458 mm
Height(in) 18 inches

Taking our commonly used credit cards as a reference, the size of the credit card is 85.6 mm x 53.98 mm (3.4 in X 2.1 in). The paper size of C3 format is approximately 3.8 times the width of the credit card and approximately 8.5 times the height of the credit card.

ISO 216 is an international standard is a universal standard all over the world except in North America (the United States and Canada) and parts of Latin America.

c series paper width and height

C Series Paper Size

Format Width × Height (mm) Width × Height (cm) Width × Height (in)
C0 917 × 1297 mm 91.7 × 129.7 cm 36.1 × 51.1 in
C1 648 × 917 mm 64.8 × 91.7 cm 25.5 × 36.1 in
C2 458 × 648 mm 45.8 × 64.8 cm 18 × 25.5 in
C3 324 × 458 mm 32.4 × 45.8 cm 12.8 × 18 in
C4 229 × 324 mm 22.9 × 32.4 cm 9 × 12.8 in
C5 162 × 229 mm 16.2 × 22.9 cm 6.4 × 9 in
C6 114 × 162 mm 11.4 × 16.2 cm 4.5 × 6.4 in
C7 81 × 114 mm 8.1 × 11.4 cm 3.2 × 4.5 in
C8 57 × 81 mm 5.7 × 8.1 cm 2.2 × 3.2 in
C9 40 × 57 mm 4 × 5.7 cm 1.6 × 2.2 in
C10 28 × 40 mm 2.8 × 4 cm 1.1 × 1.6 in

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