css - How to make icon same/similar physical size on range of different devices? -

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i've got problem has me stumped. seems must common issue nowadays, i'm surprised couldn't find question it.

basically, have icons appear on site. want them appear same size - touchable size - on every device. old cheap 2.3 samsung new high 2560x1440 high res display, want these icons 1.5" across. similar size on tablets, on computers, etc.

what reasonable approach figuring out, without instance making complex table of whole range of devices , screen sizes?

you should use absolute measure values (cm, pt, mm, in, pc) instead of relative ones (px, em, %) :

.my-image {     width: 1.5in;     height: 1.5in; }

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