While 2.25 in may be correct for one size chest armor, it might not look correct for a smaller (or larger) set of armor.
Below this image shows that the logo is about 1/3 or a little less of the length across the top of the armor piece. I have added scale lines to show proportion, image from the MOM exhibit.
Thanks,actually hadn't taken into consideration of the size difference, but that will help a lot. I'm still not quite there yet tho I'm practicing weathering and what not on the other armor.