Personalized First Birthday Happy Owl Women's Plus Size T-Shirt. Our 1st Birthday Look Who's One Owl Birthday design is ideal for celebrating your baby's first year of life. The cartoon owl adds a playful touch, making it a fun and festive choice for the occasion. Whether you're looking for invitations, decorations, or party favors, our design is versatile and can be used in a variety of ways to make the celebration extra special. 100% combed ringspun cotton premium jersey (CVC Colors are 60/40 combed ringspun cotton/polyester)