trad 'canon' of sporran styles

[Downunder Kilt]

Brown leather = day
Brass cantle & brown leather = day
Black leather = day
Brass cantle & black leather = day
Hunting sporran, all leather = day
Full mask sporran = day or evening
Hunting sporran with white metal cantle = more formal day into evening
Full fur with white metal cantle = evening formal
Horse/Goat hair sporran = evening formal usually with a white metal cantle (those without a metal cantle have been known to be worn during the day)

There are those sporrans known as the semi formal that have a fur front and leather flap. I like Jock's use of the term neither fish nor fowl as the description of those sporrans

The above list is not a definative one by any means, merely a guide that can always be altered depending on circumstances