Paper Sizes

ISO 216 Standard

ISO 216 is the international standard that defines the A, B, and C paper size series used worldwide. Although smaller printed items are often produced to specific industry standard dimensions, these formats are useful to understand when preparing, scaling, or positioning artwork for print.

A Series

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.

A Series Guide

Size	Width (mm)	Height (mm)
A0	841	1189
A1	594	841
A2	420	594
A3	297	420
A4	210	297
A5	148	210
A6	105	148
A7	74	105
A8	52	74

B Series

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.

B Series Guide

Size	Width (mm)	Height (mm)
B0	1000	1414
B1	707	1000
B2	500	707
B3	353	500
B4	250	353
B5	176	250
B6	125	176
B7	88	125
B8	62	88

C Series

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

C Series Guide

Size	Width (mm)	Height (mm)
C6	114	162
C5	162	229
C4	229	324
C3	324	458
DL	110	220

Better printing C size envelopes 560x373 1

Ready to Get Started?

In the UK, many small-format printed products are produced to standard dimensions designed to fit neatly into wallets, holders, or packaging. While most projects follow established size conventions, understanding common paper formats can be helpful when scaling artwork or adapting existing designs.

If you are unsure which size is right for your project or need assistance setting up your print files, our team is happy to advise. Get in touch for guidance or a quotation and we will help you move forward with confidence.