The RAF frogs pictured in post 1 would take, at a pinch, a belt of no more than 1 1/2" wide in their "folded up" state which is how both frogs came to me from the dealer. I would guess that the dealer got them in this folded state from military storage?

I expect that I have around a dozen different Britishicon frogs even though I don't specifically collect them, mainly ones that have come with bayonets.