In this Infant Ariel Costume, your little one can explore under the sea! Underwater adventurers will love dressing up like her favorite Disney sea princess with this Ariel Costume. Perfect for Halloween frolicking, this Ariel costume includes layered shirt and character cameo. Infant Size 12-18 months. Availability: This Infant Ariel Costume takes approximately 1-2 business days to leave the warehouse plus transit time. Please allow additional time during peak holiday periods.