Mermaid Cupcake Boxes (1 Dozen) by CarnivalSource.com! Your cupcakes will really make a splash with guests when they can take them home in these fun mermaid-inspired cupcake boxes. Featuring scales and different sea life these boxes really make it easy for guests to take home a favor from the party. Includes cupcake holder inside for easy transportation. Find more great items like this in our Mermaid Party Theme category here at CarnivalSource.com. These Mermaid Cupcake Boxes will make a perfect addition to your next mermaid-themed party! Each box measures 4.25 inches square. x 4 inches talland is made of paper cardstock, making them safe for kids ages 3 and up. The inner cupcake holder makes it easy to transport cupcakes from the party. Plus, they'll ship from our Missouri warehouse within one business day. Find more mermaid-themed party items in our Mermaid Party Theme category.