Twist Bow D'Orsay Flat Mustard Yellow. Size 9. Runs big. Never worn with tags, mustard flats. The perfect shade of yellow. Add a pop of warm color to any outfit. There are so many ways to style these cuties. Go big and bold. Sweet, sassy, and flirty! Add to your wardrobe today! From a smoke-free, pet-free, fragrance-free home.