Paper Sizes

ISO 216 is the international standard that defines the A, B, and C paper size series used worldwide. Although business cards are typically produced at a standard UK size of 85 × 55 mm, these formats are useful to understand when preparing or scaling artwork for print.

Use our visual tool below to understand the A Series. The largest A Size available is A0, which when folded in half becomes A1. This pattern is continued through the whole A Series. The smallest A size available is the A8.

Although it looks almost identical to the A Series, the B Series does differ very slightly. The sizes are based on the geometric mean of two consecutive A Series sheets. As an example, B3 is between A2 and A3 in size.

Most commonly used for envelopes, the C Series is used to accompany the A and B series papers.