Making an accurate range object for a turret object.

When making a simple tower defense game I've come across this seemingly simple issue. I want to make it so when the mouse is hovering over a tower, an object will popup over the tower that is suppose to represent the towers range. This sounds very simple to do, just make the range sprite the same size as the range. But that isn't a proper calculation for the range as I've learned. What would be a simple way to make a proper range sprite for a turret?

Assuming your range indicator is a circle with diameter the same width of the sprite... your range, or distance from the tower to the edge of the circle, would be the radius of the circle - half the diameter. So set the width and height of the range indicator to 2*range and center it on your tower.

oosyrag I figured out to do: Turret Range*1.8 = X, X = Range Object size. Thanks anyways.