Very cute 2pc set. Tiny hole at the bottom of the skirt from use with swimming fin shape like a tail (not included). Size is 130 girls, equivalent to US 9/10. USUKEurope 9 to 10 8-9 128-134 cm Make a splash at the beach or pool with this adorable 2-piece mermaid tail swim set! The set is made of comfortable and machine washable polyester material and comes in a vibrant multicolor design. Perfect for little girls who love the beach and all things ocean-related, this set is sure to be a hit.