Clockwise from top left:
Bag: Rebecca Minkoff (more color options on sale here)
Shoes: Asos (also in white & black; 20% off sitewide with code TAKE20)
Dress: Diane von Furstenberg (extra 30% off with code WKEND30)
Top: Madewell (a great striped version extra 50% off here)
Shirt: J.Crew (extra 30% off all sales with code SHOPJCREW)
Blazer: Vince (extra 35% off)