?mmは?px(イラレでweb書出しでサイズ確認)


1mm = 約2.835px
1px = 約0.35278mm

(参考)
100x100px = 35.278x35.278mm
100x100px

1x1mm = 3x3px
1x1mm

10x10mm = 29x29px
10x10mm

100x100mm = 284x284px
100x100mm

1000x100mm = 2835x284px
1000x100mm