I am trying to insert a scale bar that when printed, will equal to an exact amount in inches when a ruler is brought onto the paper. I have set my projected scale to 1:12,650 so 1 inch will equal 0.2 miles. Seems like this should be a very simple thing to do, especially when working with maps but ArcMap makes it seem like it's not possible. I understand I can bring to the ruler part at the top of my layout and measure from there, but that won't give me an exact like I am looking for.
Any ideas on how or if this is even possible?