It's interesting thinking about how fashion and culture would work among a people who live many human lifetimes. I find that Human's tend to find their style when they first become adults, so for Elves you'd imagine a breadth of fashion, hairstyles and customs spanning centuries, even if things change more slowly.
And not to be that guy but if we were to work the Second Age into a real world context, what time period would that be? Between Napoleon and the Great War or would it be the time between the two world wars? I wouldn't mind seeing what an Elven flapper looked like.