Premature Baby Sizing Chart This chart will help with trying to guess what size you little one is. Don't worry if they don't fit exactly into our guidlines as we can custom make any of our range to suit. Simply measure and we will create! Premature Baby Clothing Size Weight Length Chest Length of outfit 00000000 Up to 1.2kg 32cm 29cm 17cm 0000000 Up to 2 kg 38cm 32cm 19cm 000000 Up to 3kg 44cm 35cm 21cm 00000 Up to 4kg 50cm 38cm 23cm 0000 Up to 6kg 56cm 41cm 25cm 000 Up to 8kg 62cm 44cm 27cm 00 Up to 10kg 68cm 47cm 29cm 0 Up to 12kg 76cm 50cm 31cm