The Girls Halloween Cosplay Wishcraft Chasing Fireflies Mermaid Costume in size 4 is a magical and whimsical outfit perfect for any young girl looking to channel her inner mermaid. The complete outfit includes all the necessary pieces to create a stunning mermaid look, from flowing fish tails to iridescent scales. Made by the brand Chasing Fireflies, this costume is sure to inspire enchantment and creativity in any girl who wears it, making it a must-have for Halloween. There are layers and layers of tool and sequence. Absolutely adorable. The cape with the full shell sequins is a size 4 to 6. That’s the size that came with the full costume.