Here's a great little silk summer dress from L'Agence will also work for a transition into fall. The classic lines, pleat, metallic belt, and the chic color need very little styling in the summer, but can carry a cardigan or a black blazer and a pair of pumps. The price is just as fabulous: Avenue32 has it on sale: $280 instead of $700 (also $315 from $525 at Bergdorf. Go figure). If you look at the "size and fit" section you'll notice it says that the dress has a slim fit at the bust (that's been my general experience with L'Agence), so I'd highly suggest going one size up unless you're Audrey Hepburn.