From Madeit Patterns:
Baby Ziggy is the teeny tiny baby sister (or brother) of ‘The Ziggy’. The Ziggy, is our ‘blank canvas’, oversized boxy top for both girls and boys. Just like The Ziggy, Baby Ziggy is quick, versatile and easy to sew, making it the perfect project for beginners. We have tweaked the pattern just a little, to be a slightly slimmer, more appropriate fit for a baby.
Included in the tutorial are two different neck binding techniques, choose whichever suits your fabric.
Make this style in sizes 0 to 18M