Most important (for us, anyway) is t-shirt quality and softness.  Like you said, we buy big and they grow into it and out of it but it&#x27;s the quality that really matters.  We buy mostly Hanna Andersson shirts for our boys.  They&#x27;re expensive but they still look good after two seasons of wear, which is remarkable for kids&#x27; clothing.  Our younger boy wears many of the HA shirts and coats that his big brother once wore.