Little ones that we classify as Micro weight between one and three pounds. These little ones will often need NICU-friendly clothing that is soft, and easy to use around all their medical needs. The ability to clothe your little one helps the bonding process and brings normality to a trying situation. Along with the NICU-Friendly styles we do carry several items that will not have the open shoulders and cater to the direct needs of the NICU. Look for the Teeny (2-4lbs) size from Perfectly Preemie if you need a size that is a little bit in between Micro and Preemie.