Personalized I Believe In Santa 2 Women's Plus Size T-Shirt. Funny Christmas Women's Plus Size T-Shirt - Vintage Red with Santa cap says I BELIEVE IN SANTA... JUST BECLAUS. Perfect holiday gift for anyone who believes in Santa Claus and Christmas. 100% combed ringspun cotton premium jersey (CVC Colors are 60/40 combed ringspun cotton/polyester)