These don't look like black tie dresses to me floral shirt waiters are more day wear. Plain jersey fabrics in a different neckline, wrap effect maybe some embellishment as someone suggested Blue & White Spot Print Ruffle Hem Shift Dress Lilliana Polka Dot Midi Dress ASTR the Label Blue Black Tie Dresses Azazie Blue Floral Tie Shoulder Shirred Tiered Dress Boho Chic, Indie & Romantic Fashion Boutique Black Tie Dresses for Wedding, Galas & Formal Events Adrianna Papell