From antiqueroyals.tumblr.com/page/6; the stippling in the background and some spots throughout the image were fixed with Photoshop.

Toria and Maud combine Renaissance-style crescent necklines with the latest leg-o-mutton sleeves. Their dresses appear to have very tight natural waistlines or Swiss belts producing double-vee waistlines.
Keywords: Downey, Princess Toria, Queen Maud, Welf family, Wettin family, Glucksberg family, Princess, Queen, British, curly coiffure, jeweled choker neck band, high enclosing neckline, partlet, crescent neckline, long tight leg-o-mutton sleeves, double vee waistline, tight skirt, necklace, bracelets