Vintage cards by Bjørn Wiinblad, These appear to be costume designs for The Little Mermaid. They are designed as a pair of two cards, a man and a woman, facing each other. The inside is blank for writing messages. Each card measures 10x15 cm. When fully opened, the total size is approximately 40x15 cm. I think it would be fun to fold them and frame them, or to frame them separately as two smaller pieces.