There are many interesting discussions on hooks in this forum but I've had a question that has never been addressed. Regardless of a hook style, length or any other variable a hook is given a size number. What is the basis of this? Does it relate to gap (gape) in some mathematical way? If this is the criteria, why do some hook styles not compare to others in this dimension? How do you measure Gap on a Scud hook?
This may seem trivial but I'm just curious.