The ZAC POSEN Mint Metallic Knit Square Neck Ruffle Mini Dress is a stylish and trendy piece perfect for young girls size 12. This sleeveless dress features a square neckline with a ruffle accent, giving it a touch of sophistication. The mint color and metallic pattern add a fun and vibrant touch to the outfit, while the short length and strappy sleeves make it ideal for any special occasion or night out. Made from recycled fiber knit fabric, this dress is not only fashionable but also environmentally friendly.