Personalized Firecracker 1st Birthday Women's Plus Size T-Shirt. Cute Women's Plus Size T-Shirt - Vintage Red 4th of July 1st birthday design with a big blue number one firecracker filled with red and white stars and star burst. Perfect for 4th of July first birthdays! 100% combed ringspun cotton premium jersey (CVC Colors are 60/40 combed ringspun cotton/polyester)