Do the touch APIs let you look at the actual dimension of a finger press, or is it just an x/y coordinate? I mean, does the information come across as a circle

Do the touch APIs let you look at the actual dimension of a finger press, or is it just an x/y coordinate? I mean, does the information come across as a circle or as total surface area lit up by the touch or anything? I don't know the tech behind the Apple touch stuff at all.