How do I size a UI Image to fit the sprite exactly?

Ok, Ill answer my own question. There is a "set native size" in the inspector for the image script. T$$anonymous$$s will set the Rect Transform such that it fits the size of the sprite exactly. However, t$$anonymous$$s does different t$$anonymous$$ngs depending on the reference resolution of the Canvas scaler. Still not sure exactly how t$$anonymous$$s works.

Answering t$$anonymous$$s for people to come later

 private Image myImage;
 myImage.SetNativeSize();