Worn once and doesn't have the string. The sleeves can unbutton off and on and can be worn with or without the sleeves. I've included a size chart from the maker. Birdy Grey maxi dress features a romantic blue floral print on a white background, crafted from lightweight polyester chiffon. This elegant gown is designed with a draped cowl neckline, delicate short flutter sleeves, and a high front slit for ease of movement. The back mirrors the front with a graceful cowl detail, making it a perfect choice for bridesmaids, wedding guests, or formal garden parties.