Looks great on its own or dress casual with a denim jacket, or dress-up with a black sweater. It runs small. The tag says US 6, but the model generally wears US 2 or US 4. Model is 2 on top & 4 on bottom. Wrinkle-free means it's great for traveling, as the Duchess's fantastic fashion sense knew well! You will have many adventures in this beautiful dress!