[PavlovsCat]

Same here, but it's a photo.. a crop from a DVD sleeve; and at least on my screen even that crop is bigger than a full DVD sleeve.

Does anyone know the coin in the picture, that is, the exact diameter of it?

Looking around me, I see plenty of super fine print on products, like lists of ingredients etc... there seems to be a real problem here. I never really notice it myself because I am shortsighted, so small writing at short distance is no problem; but I heard there are people who are farsighted or have even crazier problems, and while I would be fine if nobody on the planet could install Windows 8, I don't think it's okay that many people could not find out what is in the food they are eating without help, even if they wanted to.

[zokier]

> Does anyone know the coin in the picture, that is, the exact diameter of it?

17.91 mm (0.705 in)

http://en.wikipedia.org/wiki/Dime_%28United_States_coin%29

I'd guesstimate that the the picture is about 10px/mm.