black tie optional dresses for wedding - Guest Dresses Black Tie Black Tie Optional Wedding Guest

The asymmetric hem drapes slightly longer at the back, whilst the half-sleeves have a subtly wider opening

Black tie can be pretty dressy, so I have provided some more examples below

As mentioned by Vogue, the A-shape given by narrow shoulders and a smooth, trumpetlike flare toward the hem became the most wanted silhouette in Paris. The idea was later popularized by Yves Saint Laurent, who, three years later, in the spring of 1958, introduced a Trapeze Line. The Trapeze Line featured dresses flaring out dramatically from a fitted shoulder line, making A-shape outfits beautifully voluminous and distinct

Luxury Lace Mermaid Backless Applique Straight Neckline Wedding Dresses, FC1925