Step 4: Scale the Image.
The Scale dialog box appears.
Our image is bigger than we want, the profile itself tells us that Molding #261 is 7/16" high x 7/8" wide. So using the logic that a ratio of .5 / 1.0 would make our image half as big. We will put the size that we want (7/8 = .875) on the left, and the size we have (1.868) on the right, and click OK.
Reenter sketch mode draw an new line and dimension it. My line at this point was .875333. Close enough so I rounded it down to .875".