Have to go to black tie dinner - described as 'ball' but there will be no dancing- with DH on Saturday. Its an industry thing with his work, so I mostly just want to look appropriate, and not spend too much money. Something I could wear again over xmas would be a plus.
Had chosen long-sleeved, jersey dress online at Coast but decided not to buy it till I got a chance to try it on in person, which took a few more weeks than planned. And then they didn't have it in the shop, and its now sold out online in my size 
I'm now torn between buying it in a 10 and hoping because its jersey fabric it will have some stretch (possibly a terrible idea), hoping to find something else I can order online as due to work will not be near shops before Saturday, or dry cleaning a knee-length grey dress I already own and hoping its ok.
Budget ideally no more than 100-120 as I don't normally go to these things. Everything I tried on in Coast and House of Fraser this weekend was too bridesmaid-y. I mostly buy work clothes in M&S, Hobbs, Banana Republic usually so not sure where to look for something like this. I'm a 12 and fairly hourglass-y (bra size 30 f, fairly sizeable hips) and early 30s.
In my position, would you go with the short dress or panic order some options to try on at home? Is there anywhere else I should look?