I am a maid of honour. Soon. And I get to choose my own outfit
And all I can think is oh fuck it might have been better to tell me what I am wearing 
Anyway, I have seen a few things but keep being told I need something smarter/more glam/more eveningy blah blah (dh/dm/dsis!)
No colour restrictions, Total outfit (bag/shoes/dress/hat or whatever) £300, but flexible
providing it is classic and would make me feel great and I can wear for years as an investment piece.
Restriction:
16/14
Large boobies
Fat Tummy 
At least the top of my arms need to be covered
Below the knee
Don't do high necklines as have a short neck
Positives:
Nice bum (so dh says but he might be biased!)
Big Boobs
Nice enough legs providing below the knee
Happy to wear heels 
So make me feel thin, glamorous and lovely I dare ya.