Is a three-button jacket correct for black tie?

Traditional dinner jackets have one button, sometimes two. Three buttons read more like a sport coat or suit jacket, so this is a looser take on formal dress. It still works for galas and weddings where the dress code is flexible.

What is the fit and length like?

The cut is described as modern with a regular jacket length, and the listing also calls the length short. Leaner buyers get a close silhouette; taller buyers should check that the hem covers the seat and that sleeves reach the wrist.

A wool blend with a satin lapel. Blends resist wrinkles and hold shape well, but they breathe less than pure wool, which matters in a warm room.

Does it come with matching trousers?

The listing covers the jacket only. Plan on black dress trousers with a satin or plain stripe, or check whether the same line sells a matching pair.

Can I wear it to a wedding instead of a tuxedo?

Yes, for evening weddings and events with a formal or black-tie optional dress code. For strict black tie, a single-button peak or shawl lapel is the safer choice.