How big is a Sims 4 tile compared to a Sims 2 tile?

Still, an honest question. I tile = 9 square feet or 3 feet per side. Got that from TS1, and I doubt it has changed since. Makes sense as a TS4 adult sim lying on the ground is 2 tiles long. I've heard the gurus say a tile is a square meter, but at ~39 inches a side, that makes adult sims 6 feet 6 inches tall, which is quite uncommon IRL, and quite out of scale in game.