Grains of sand

It seems to me I've heard reference to something being like "the infinite grains of sand on the beach". This is, of course, wrong. So then it caused me to think of the numerous grains of sand and the numerous stars in the sky and wonder which is more numerous.

Consider: the grains of sand on all the beaches on earth are both countable and finite. Last I checked, we were uncertain whether the stars are finite. (Question for someone with a bit more math at hand: if they're infinite, how infinite are they?)