The Avenue plus-size dress in black with butterfly cap sleeves and off-white piping sounds like a sophisticated choice. The blend of 95% polyester and 5% spandex provides a comfortable, slightly fitted silhouette that works well for both evening outings and office settings. Its classic black color and elegant details make it a versatile piece that can transition smoothly from late summer into fall. It pairs nicely with both statement jewelry for a night out and a blazer for a polished office look.