Please?
I'm 30, 5ft 9 and size 12ish.
It can be quite casual, though I particularly love the belt mac style, fairly stylish ie I would lose a hood for a nice look. It is for pushing buggy around etc, mainly worn with jeans. Not too warm as I get warm enough pushing a double! I quite like ones that cover the bum or are a bit longer as I hate wet/ bum thighs. Can stuff hair in a hat if need be though, it's not for serious walking.
ta