It is black tie for the guys, which is easy, but I don't know what to go for. I'm 23 so I don't want to look like a frump, but I'm also not hyperfashionable or skinny....
I'm 5'7", size 12, all in all reasonable figure apart from slightly wobbly tum...
Need shoes and a frock (ideally), although a really glam trouser suit might work well too. Links please !