"I wanna marry you because you're the first person I wanna look at when I wake up in the morning, and the only one I wanna kiss goodnight. Because the first time that I saw these hands, I couldn't imagine not being able to hold them." – Definitely, Maybe
If they put a yardstick up and Ravenclaw's tower is the same height, because Gryffindor was trying to beat them, a yard stick isn't 1 foot. Meaning the Gryffindor tower is 3 feet or a yard taller than Ravenclaw's tower.