Do you see the E? It goes from the very bottom line under the bottom drawing, all the way to the top of the top drawing. There is a number that says 11. There is another measurement on the very left of the top drawing that says 3.5. Therefore The whole thing is 11, but you would subtract the top drawing which is 3.5... 11-3.5 is 7.5. The reason you subtract the measurement of the top drawing is because "Q" starts at the bottom of the top drawing, and goes to the very bottom line... That make any sense?