Too wide to fit in anyone's pocket, but the ratio is the sine of 45 degrees! Seems like a very non-Apple thing to do, honestly. My jeans don't care about math.

It’s the size of a passport, which does fit in most pockets.

I just put a passport in my pocket, and it did fit. It's a lot thinner, and bends a bit... but yeah, maybe it will. Interesting.