Siblings Shirts - Best gift idea for big brother! Birth announcement, baby shower, birthdays, Christmas present for son / grandson. Cute little kids Tee. Premium quality, short sleeved t-shirt. preshrunk 100% combed-cotton knit, machine washable. Available in a wide variety of colors and sizes: Infant sizes: 6 - 24 Months / Toddler sizes: 2T-7T. Choose the size and color options from the drop-down list. Machine washable. The best gift ideas for kids birthdays, special occasions, holidays, baby showers & big brother, big sisters presents.