Mermaid of the Sea Kids Costume This child mermaid costume includes a headpiece and deep sea green sequin mermaid dress. The mermaid dress has a small slit in the back to for comfortable movement and sitting. Our child mermaid costume comes in child sizes Small, Large, Medium. Please note: This item's color may vary due to inherent manufacturing variations or your computer monitor's color settings. The item you receive will be identical or substantially similar to the item pictured in this listing.