Personalized Personalized 1st Birthday Boat Women's Plus Size T-Shirt. This fun personalized 1st sailboat Women's Plus Size T-Shirt - White makes a great gift idea for a girl or granddaughter's birthday. Make a custom gift idea for a 1 year old. 100% combed ringspun cotton premium jersey (CVC Colors are 60/40 combed ringspun cotton/polyester)