Is star size related in any way related to location in space or location in their respective galaxy s disk. Or in age.?

Yes, and no.

Most spiral galaxies have different types of stars in different locations. Dwarf and normal stars could be most anywhere. More massive, older stars are in the central bulge. Younger, hugely massive stars are in the spiral arms. They condensed from gas and dust clouds there. As pressure waves move through the arms, the gases collect and form stars.

But a star has different sizes depending on its mass and its temperature. A young hot and massive star might be large, but shrink as it ages and loses mass to energy and particle wind. If its core loses energy, the star will shrink in size. If the burning zone of fusion moves out from the core, the star will swell to a giant. Then if it has enough mass, it might collapse into a black hole. with negative size. In the center of most galaxies are black holes.

So a star might change size with age, might form into a large or small one depending on its birth location in a galaxy, and it might end up with no size at all, not even a part of our universe while it is in the center of a galaxy. Or somewhere else.

No.

Yes!