This is a three-piece outfit for children, likely designed for casual wear. The ensemble includes:
Top:
A white, long-sleeved top with a round neckline. It features a print of flowers and butterflies near the bottom and embellishments on the sleeves.
Vest:
A dark blue denim vest with silver stud detailing around the shoulders and neckline. It also has a floral appliqué on the right shoulder.
Bottom:
Matching dark blue denim jeans with floral appliqués on one leg and stud details near the ankles.
The outfit appears to be made of denim and cotton, suitable for spring or summer. The style is casual with decorative elements, making it appropriate for everyday use or informal gatherings.