cocktail dress for birthday dinner Strapless dress, short prom with ruffles below, party summer formal gown fg6016 Stylish and fashion design Sodopo Women Short Sleeve Casual

The key is ensuring the suit fits well, to give a sleek, elegant silhouette

With one side featuring long sleeves and the other exposed shoulders, this dress exudes boldness and sophistication

Overalls Denim overalls, worn over a white t-shirt with one strap undone accurately represent the 90s fashion

A high-gloss black patent leather upper gives these penny loafers a striking formal look, while the plain toe and slip-on design keep the silhouette sleek

Something in an elevated fabric, like silk or crepe, with sharp tailoring is probably alright (though to be safe, you can always double check with the couple)