The biggest helmet you have (Patreon)

My boyfriend's head circumfence is 62 cm. That's almost 25 inches. That's the circumfence of a very small person's waist.

As a player of airsoft and a fan of hugh quality outdoors/military surplus clothing, he is on a constant hunt for headgear of the largest possible measurements, because no manufacturer makes a size too big for him. The biggest possible one might be large enough to fit.