Great gift idea for a 13 year old boy / girl. 13th birthday gifts for Son or Daughter . Premium quality, short sleeved t-shirt. preshrunk 100% combed-cotton knit . Machine washable.Available in a wide variety of colors and Junior Fit sizes: XS-XL. Choose the size and color options from the drop-down list. Machine washable. The best gift ideas for kids & birthdays, special occasions, holidays, big brother, big sisters presents.