Disney The Little Mermaid Ariel and Sisters Doll Set 30th Anniversary 2019 New. Ariel is reunited with her sisters in this doll set celebrating the 30th anniversary of Disney’s The Little Mermaid. The Seven Princesses of Atlantica come with rooted hair, colorful outfits and tails, plus poseable features, so make them part of your world. The doll can bend its joints and change its pose. Package dimensions: 22 x 7 x 6 inches. Set includes seven dolls: Ariel, Aquata, Andrina, Arista, Attina, Adella, and Alana. International Buyers – Please Note.