Celebrate in style with this adorable Happy Mermaid Birthday T-Shirt. This black tee features a vibrant and playful design, perfect for a birthday girl. The design includes a cute mermaid with a crown, the words "Happy Birthday mermaid", and a big number one decorated with a mermaid tale. The tee is a classic fit, which means it can be worn on different occasions and is comfortable for all-day wear. Makes a wonderful birthday outfit or gift for any little mermaid lover!