The long sleeve flutter tee is great for everyday but can easily be dressed up with necklaces and accessories. Customers reviews say they run true to size. A child in most 12 month clothes can wear the smallest size, a child approx. 32 lbs. 38" in most 3s wears the 3T (with some room to grow), and another child in most 7s prefers the 7/8T. This particular one is a super soft/smooth milk silk fabric.