Inches to Millimetres (mm) conversion for Standard sizes

Inches	Millimetres
6 x 4	152.4 x 101.6
5 x 7	127 x 177.8
6 x 8	152.4 x 203.2
8 x 8	203.2 x 203.2
8 x 10	203.2 x 254
8 x 12	203.2 x 304.8
A4	210 x 297
10 x 10	254 x 254
12 x 12	304.8 x 304.8
11 x 14	279.4 x 355.6
12 x 16	304.8 x 406.4
A3	297 x 420
10 x 20	254 x 508
12 x 18	304.8 x 457.2
16 x 16	406.4 x 406.4
12 x 24	304.8 x 609.6
16 x 20	406.4 x 508
A2	420 x 594
16 x 24	406.4 x 609.6
20 x 20	508 x 508
12 x 36	304.8 x 914.4
20 x 24	508 x 609.6
24 x 24	609.6 x 609.6
20 x 30	508 x 762
15 x 45	381 x 1143
24 x 30	609.6 x 762
A1	594 x 841
24 x 36	609.6 x 914.4
30 x 30	762 x 762
20 x 50	508 x 127
30 x 40	762 x 1016
20 x 60	508 x 1524
36 x 36	914.4 x 914.4
30 x 45	762 x 1143
AO	841 x 118.9
40 x 40	1016 x 1016
30 x 60	762 x 152.4
40 x 50	1016 x 127
40 x 55	1016 x 1397
48 x 48	1219 x 1219
40 x 60	1016 x 1524
36 x 72	914 x 1828
30 x 90	762 x 2286
32 x 96	81.2 x 2438
48 x 72	1219 x 1828
45 x 90	1143 x 2286
48 x 96	1219 x 2438