I can't remember where I read this but the font they write on the roads (at least in the UK) when looked at straight-on seems unusually tall, but when viewed from the steep angle of a car it looks normal sized.
I would guess the same is true with these numbers, when a pilot is taxing around the runway the font won't look as tall because of the extreme angle of viewing from the cockpit.
I would guess the same is true with these numbers, when a pilot is taxing around the runway the font won't look as tall because of the extreme angle of viewing from the cockpit.