I am slim, but have wide hips and large breasts. Suits either don't fit me and look awful, or seem to accentuate the hourglass wildly.
This is far and away the best I've tried so far:
www.hobbs.co.uk/index.cfm?page=1405
the wide legs on the trousers balance out my top half - but I don't think such wide legs are conservative enough to wear to job interviews?