Paper and Envelope Sizes

Below you will find sizes of Paper/Card and Envelopes in both Metric and Imperial measurements.

Size	Metric	Imperial
A0	1189 x 841 mm	46.8 x 33.1 in
A1	841 x 594 mm	33.1 x 23.4 in
A2	594 x 420 mm	23.4 x 16.5 in
A3	420 x 297 mm	16.5 x 11.7 in
A4	297 x 210 mm	11.7 x 8.3 in
A5	210 x 148 mm	8.3 x 5.8 in
A6	148 x 105 mm	5.8 x 4.1 in
A7	105 x 74 mm	4.1 x. 2.9 in
A8	74 x 52 mm	2.9 x 2.0 in
A9	52 x 37 mm	2.0 x 1.5 in
A10	37 x 26 mm	1.5 x 1.0 in

The simplest way to explain the aspect ratio of A sizes is that two of one size will equate to one of the next size up. For example, 2 x A4 sheets side by side (portrait) will equate to 1 x A3 page and 2 x A3 pages side by side (portrait) will equate to 1 x A2 size.

The larger the size of paper the smaller the number – A10 is the smallest and A0 size is the largest.

Envelope Sizes

Common Metric (European) Envelope sizes:

Size	Metric	Imperial
C3	324 x 458 mm	12.75 x 18 in
C4	229 x 324mm	9 x 12.75 in
C5	162 x 229 mm	6.4 x 9 in
C6	114 x 162 mm	6.4 x 4.5 in
C7	81 x 114 mm	4.5 x 3.2 in
C8	57 x 81 mm	3.2 x 2.2 in
DL	110 x 220 mm	4.3 x 8.5 in