Mermaid costume for children

Mermaid costume with sequin details. Long skirt looks like a tale, but stretchy material makes it comfy and easy to walk around in. Size is listed as 130 which they say is the equivalent to a US 8, however I think this item fits small and is better suited for an average 5-6 year old, but depends on the child. Please see pics of unstretched garment to determine correct sizing.