Size 12 matching girl and doll nightgown is mint green satin material. The edge has a ruffle hemline. The doll nightgown will fit 18 inch girl dolls like American Girl, Our Generation, My Life, Journey girl dolls. Our girl clothes run large so please check these measurements before ordering. When lying flat, the nightgown measures 14 1/2 inches from the seam at the shoulder/sleeve to the other side shoulder/sleeve seam. The nightgown is 44 inches from the shoulder to the hem.