Please help outfit ideas - clueless!!

[toomuch2young]

Hi, I have been invited out to a place which requires smart casual dress and no jeans.
I live in jeans, usually combined with a vest top or a slightly dressier top or a blouse or a shirt. I don't go out in the evening often and when i do it's usually a local place and everyone wears similar.
It's never very feminine and I haven't worn a skirt since school days! Shoe wise I usually wear chunky boots or pumps. Weekend day times its usually jeans and t shirt and trainers. I am mid 20's.
Can any of you wonderful ladies give me ideas to look smart enough without feeling uncomfortable - most of the ladies will be wearing cocktail dresses but I feel really uncomfortable with that idea.
I'm thinking along the lines of black trousers, chunky boots and perhaps a blouse??
Clueless.

There's a BIG difference between smart casual and cocktail dresses, if the former your outfit sounds fine, if the latter definitely not... Do you know which is the case?

Oh I really don't! The venues website just says smart causal and no jeans, but all the others have decided on these dresses.

ok, what kind of even is it? Day/evening? What clourings/size/shape/height are you?

Evening. It's dinner and entertainment. Private event hire so may be people are going more dressed up than the venue specifies?
I'm 5ft 3 and average build, dark hair, and like a fish out of water!!

I think skinny black trousers are fine, and make sure the top is dressy. Not sure about chunky boots though, the way to make trousers look dressy IMO is heels.

Something like this?
www.asos.com/ASOS-Petite/ASOS-PETITE-Basic-Peg-Trousers/Prod/pgeproduct.aspx?iid=2523787&cid=13686&sh=0&pge=0&pgesize=36&sort=-1&clr=Black

Ooo those trousers look good, thanks.
Not sure about heals, I have some healed boots...
I don't think I'd walk in a stiletto heal I have enough issues balancing anyway!!

They don't have to be stilettos, a kitten heel or a wedge heel is fine.

If you're going for ankle grazing trousers (i'd say unless you're going for high heels and v wide legs it's the only way to do 'evening' in trousers) then you need bare ankles, so the boots would be out. If you hate the idea of heels what about:

www.asos.com/ASOS/ASOS-LIBERTY-Pointed-Ballet-Flats/Prod/pgeproduct.aspx?iid=2611846&cid=13685&sh=0&pge=0&pgesize=36&sort=-1&clr=Black%2fnude

www.asos.com/Faith/Faith-Abdula-Toecap-Flat-Shoes/Prod/pgeproduct.aspx?iid=2841044&cid=6459&sh=0&pge=0&pgesize=204&sort=-1&clr=Nude