The older girl is Princess Elisabeth (b. 1894) and the younger is Princess Maria (b. 1900). The photo is probably by Uberoth.
Marie wears a dress with a wide hexagon motif and a contrasting waist band. Her bodice appears to have a modesty piece and square neckline.
Keywords: 1904, Marie of Romania, Wettin family, Princess, Queen, curly coiffure, square neckline, modesty piece, blouson bodice, waist band, natural waistline, close skirt, necklace, earrings, wrap