Based on an estimate of Leopold's age, this photo dates to around 1909.
From eBay; size increased 150% by gogm.
Elisabeth wears an over hanging bodice and A-line skirt in this photo.
Keywords: Queen Elisabeth of Belgium, Wittelsbach family, Wettin family, Princess, Queen, bouffant coiffure, high enclosing neckline, vest bodice, blouson bodice, long tight sleeves, natural waistline, A-line skirt, buttons, necklace