The absolute defining rule for a white tie dress is that it must be a full-length ball gown that completely covers the ankles
Almack's - a History To keep things classy, [...] Regency Matchmakers Regency Matchmakers: In 1810 at the Court of Chancery a marriage broker took legal action to recover fees from a client who refused to pay when he failed to snare [...] Sources La Belle Assemble
Sleek and spectacular, this cowl-neck long off-white formal dress 7487W is from Ladivine by Cinderella Divine
Decoding Dress Code Terminology Black Tie: The Classic Evening Formal Dress Code The black tie dress code originated in the late 19th century as a more relaxed alternative to white tie (full evening dress)
It was long but worked for the occasion, and the chest was a perfect fit as was the waist
You can choose a dinner jacket in a different material, like velvet, or a rich colour such as midnight blue, deep burgundy, or forest green