I could swear that I've seen a photo, old-time work yard, with a man standing
next to his try square. It's taller than he is.
I can even see using one that size, maybe in shipbuilding.
But, since no-one has mentioned such a size, I suppose I must be misremembering
a similar tool, or maybe my mind is making it up wholesale.

Or maybe it was a tall-tale postcard photo, like the ones of cobs of Iowa corn
being carried in railroad log cars....
Tom Conroy