Mid Length Polka Dot Dress With Sleeves. D885 Catherines of Partick Halter Neck Shiny Dark Navy Blue Black Sequines Prom Dresses, Dark Navy Blue Black Formal Dresses Off the Shoulder Shiny Green Black Long Prom Dresses, Green Black Long Formal Evening Dresses When the invite says black tie optional but you still want to dance all night This polka dot number was the perfect wedding guest dress flowy, flattering, and so easy