RE: Tips on the US National Insignia
Bar Issues
Mr. Star is the correct size in this next example but because the bar is too short, or out too far from the star, he has to flap his arms and suspend himself. It looks as if he'll just slip out of the insignia altogether under a G-load.
Remember, the bar does not, and should not, stop at the outer circumference of the surround. It should always touch Mr. Star's pointy fingers. This is another more than subtle but often made mistake, and you will see it on models and decals. You will rarely see this mistake on the full scale. In the example he doesn't touch the bars. Note how it makes the blue circle look bug-eyed or bloated even though it is the correct dimension.