To qualify, it has to be an outfit regularly worn in a professional setting* without setting off alarm bells for sloppiness with the majority of colleagues (at the minimum end). -tailed evening coat -tuxedo, other evening wear, funeral wear, conservative wedding attire -CBD -Suit with more pronounced quirks (louder shirts and patterns and the like) -Blazer, tie, slacks (from this point down, like it or not, "dress" loafers probably come into play and place the outfit lower) -Odd jacket, tie, slacks -Odd jacket/blazer, tie, chinos -shawl collared cardigan, tie, slacks (chinos/loafers drop it) -other cardigans, tie, slacks (chinos/loafers drop it) -No coat, tie, slacks (it happens, especially in warmer climates) (chinos/loafers drop it) -shirt, slacks (chinos/loafers drop it) Shifts, errors or oversights? I'm sort of curious as to where both MC Casual and SW&D fall in the list. There is probably some overlap, though I imagine most of the SW&D don't qualify. The thought occurred when sugarbutch stated that t-shirts don't have a place on the MC Casual thread (which might have more to do with giving something the viewer can take away than level of formality) *Probably not IT firms though. Anything seems to go there (not that there is anything wrong with that). I have a few friends who work at one of the three largest web hosting companies in the US; one wore a chipmunk costume for casual Friday or some such a few months back...and he is not on the tech side of things.