black long sleeve dress formal YMDUCH Women's Off Shoulder Mermaid Long poised coverage Long Sleeve Formal Chiffon Dress

I wear sweater dresses most often with tights and tall boots, whether the dress is long or short

For Black Tie Optional events, a very smart, dark suit with a conservative tie and white shirt can be acceptable if a tuxedo is genuinely not an option, but a tuxedo is always preferred

It reads as intentional, sophisticated, and occasion-appropriate under every lighting condition, against every background, and alongside every other color in the room

Detailing: Flattering ruching along the sides and back

The closed back style ensures a secure fit, while the absence of a high slit adds a modest touch

By the late 1930s, the dinner jacket had become firmly established as preferred formal wear in royal circles