From the USA Library of Congress Bain collection.
Cecilie wears a blouse or sheer upper bodice with upper-puffed sleeves ending in flared cuffs and a tight skirt in this photo.
Keywords: Princess Cecilie, Duchess, Crown Princess, Mecklenburg-Schwerin family, Hohenzollern family, German, straight coiffure, blouse, square neckline, elbow length upper puffed sleeves, cuffs, tight skirt, necklace, bracelets