Pennsylvania
I was reading "Hear Me Roar" on FanFiction.net, and I noticed you described that, when Tyrion and Pippin take the Ent-Draught and become taller, it is noted that Tyrion almost reaches 5 feet and Pippin goes over. In canon, Pippin's post-Ent-draught height was 4 feet 5 inches. Would it not be reasonable to have Tyrion be almost 4 feet tall post-Ent-draught and for Pippin to be at his canon 4 feet 5?