Personalized Big Brother T-shirt Your little guy will look like a big boy wearing this adorable Personalized Big Brother T-shirt. This personalized shirt is an excellent gift when he comes to see his new baby brother or sister for the first time. Our Personalized Big Brother T-shirt is available on our premium white 100% cotton Personalized T-shirt, machine washable in youth sizes XS-L. Also available on Ash Gray. Includes FREE Personalization! Personalize your Big Brother Youth T-shirt with any name and please specify little, middle or big. This shirt is one of our favorite big brother gifts!