The dimensions of the C series envelope sizes, as defined by ISO 216, are given in the table below right in both millimetres and inches (cm measurements can be obtained by dividing the mm value by 10).

C series paper sizes and dimensions are defined by the ISO 269 international paper size standard. The C series is usually used for envelopes. The area of C series paper is the geometric mean of the …

May 25, 2025 · Envelope Size Guide that helps you choose DL, C5, C6, C4, or C3 with ease—save on postage, prevent document damage, and boost your brand’s mailing game.

Size guide for C6, C5, C4 , DL envelopes.

A C5 envelope measures 162 × 229 mm or 6.4 × 9.0 inches. An A5 piece of paper will fit into a C5 envelope. C5 is part of the C series, most commonly used for envelopes, and is defined by the ISO …

The C5 envelope is perfect for marketing materials, greeting cards, and event invitations. It fits an A4 document folded in half, making it a popular choice for corporate and promotional mailings.

The most common used ISO C envelopes are C4, C5, and C6 size. Larger or smaller sizes are not commonly used, because it is not convenient for mailing and delivery.

What is the C5 size for envelopes? C5 envelopes already belongs to the larger enveloppes category as it has dimensions of 229 x 162 mm, allowing it to fit an unfolded A5 paper or an A4 folded in half.

C5 Envelope Paper Size, Dimensions and Format from the International Envelope Series which can be found in mm, cm, m, inches, picas, pixels and points.

The C5 size is part of the 'C' series in the ISO standard, designed specifically to accommodate envelopes. This particular size is perfectly suited to hold A5 sheets or A4 sheets folded in half, …