Buy it now is a Knit Works girls short sleeve cap sleeve 2-piece dress set. The size is medium (10/12), and the color is multicolor. Regular fit. 
Vest - sleeveless, white, fabric-twill, fiber - 100% cotton, closure is button down, wash and dry. The length of vest is 13". 
Dress - Pullover head, neckline is round, short sleeve, cap sleeve, knee length, fabric - knit, fiber - 95% polyester and 5% spandex. The length is 31" long. See pictures. Any questions please ask.