also try the shape tool.
and you can make a circle "brush"
make a circle selection, the go to the edit menu and choose stroke and set a pixel width that is in line with what you need, the set inside or outside. and okay.
now go back to the edit menu and choose "define brush preset" and give you new circle brush a clever name like circle200 (if the brush is 200 pixels wide)
the new brush will be at the bottom of the active brush list.
hey this might be a good one for a tutorial!
...mischance nothing, thus idle woe.
all beer has food value...
all food does not have beer value.