Dark blue, sleeveless Jessica Simpson dress, often described as having a flapper style.

Key features of the dress include:

Color and Material: The dress is a deep navy or royal blue color. It appears to be made of a lightweight fabric, possibly a blend of polyester and spandex, with some stretch.

Design: It is a sleeveless dress with a square neckline. The body of the dress is adorned with numerous circular sequins or discs of varying sizes, which create a textured, shimmering effect.

Length and Hem: The dress is likely knee-length. It features a distinctive ruffled, layered hemline at the bottom, adding volume and movement.

Style: The overall design, with its straight fit and ruffled hem, gives it a vintage, 1920s flapper aesthetic.