These do not fit Barbie. The doll is not included. I am not sure who these are for since I could not locate them.
Disney The Little Mermaid Transforming Ariel Fashion Doll, Switch from Human to Mermaid
Disney's The Little Mermaid Transforming Ariel Doll
Barbie® Dreamtopia Twinkle Lights Mermaid™ Doll, Ages 3 to 7
Disney The Little Mermaid Sing and Dream Ariel Fashion Doll
LITTLE MERMAID BARBIE Sleeping Bags $5.00 - PicClick
Little Mermaid Live Action - Ariel Petite Doll
media-/product/seasonal-gardeni
Little Mermaid Panties FOR SALE! - PicClick
Disney Princess Ariel Doll