Princess Ariel "Blue Dress" Little Mermaid Cosplay Pattern Posh Peanut Disney's The Little Mermaid Magical Mermaid Tulle Skirt Bodysuit Dress in Blue, 6 12 mo, Viscose from Bamboo This little mermaid dress was so simple to make! I used the Sirena pattern from Boo and Lu, using the mermaid skirt with tulle layers and the plain bodice. The mermaid scales and the coordinating Animated Ariel Blue Dress Costume Little Mermaid Ariel Dress Ariel Cosplay Costume