HereForTheBeer: Ah, yes, size matters. My current MotoX is 'just right', fitting in the pocket and barely noticeable, and easily held in my small-ish hands.
ET3D: You're talking about the first gen Moto X, I assume. First gen had a 4.7" screen, second had a 5.2" screen, and then there's the Moto X Style (Pure Edition) at 5.7". Like all phones, bigger, bigger, bigger.
Not sure. There might have been an earlier version in other parts of the world - or I'm confusing it with the phone I had before this one. But yeah, some of these phones are downright huge, and people then make them, er, huger by adding on a rubber case. The size of this one is just about right for me.