C Series Envelopes (ISO 216) Paper Sizes

C Series Envelopes (ISO 216) includes 10 standard sizes ranging from C0 (917 × 1297 mm) to C8 (57 × 81 mm). The C series is used for envelopes — a C-size envelope neatly holds the matching A-size sheet (a C4 envelope fits an A4 sheet unfolded).

The C series is used for envelopes — a C-size envelope neatly holds the matching A-size sheet (a C4 envelope fits an A4 sheet unfolded).

All C Series Envelopes (ISO 216) Sizes

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