Personalized 60th Birthday Party Gift Women's Plus Size T-Shirt. 60th Birthday Party Women's Plus Size T-Shirt - White has a unique and colorful balloon and stars logo in rainbow lettering with Party - 60 Rocks bday slogan. Get ready to celebrate your I’m 60 bday in style. 100% combed ringspun cotton premium jersey (CVC Colors are 60/40 combed ringspun cotton/polyester)