You’re in "Large" or "Magnum" territory (Nominal width: 56mm+).
You’re the "Standard" king (Nominal width: 52mm–54mm).
He read on. To do this right, he needed a piece of string or a flexible measuring tape. He’d done that part in his bathroom an hour ago, feeling ridiculous as he wrapped a shoelace around himself. The internet informed him:
He walked out into the cool evening air, two boxes in hand, finally feeling like he had the measure of things.