It's a simple pattern for 4 ply yarn (I have a couple of cones of baby 4 ply), and ranges from small premature baby sizes to 6 months old size. Best of all, there is a V-neck option, which I like for very small babies so that they don't have anything tight around their necks.
I knitted the second size (12 inch chest - yes, it's hard to believe but babies that small do survive) and followed the pattern for the buttonholes when it said for each one to cast off one stitch, then cast on a stitch in the next row to complete the hole. But the buttonhole rib was knitted on very fine needles (size 12 in old UK size, or 2.75mm), so the hole made was very tiny indeed. I went through all my buttons, and believe me, I have a lot. Even small shirt buttons were too big. Eventually I found some tiny rectangular pearl buttons which I was able to coax through the buttonholes.
I decided that when I knitted another of these cardigans, I would have to make bigger buttonholes, no matter what the pattern said. Fast forward to this morning, when I am knitting the buttonhole rib on my second cardigan from this pattern. What do you do when you want to know how to make better buttonholes? You use Google, of course! And I found the perfect instructions on the website of a US magazine called Creative Knitting. The buttonholes this time are 3 stitches across, and are the neatest that I have ever managed, thanks to these instructions.
It was so easy to find buttons to fit, I was spoilt for choice. I decided to go for some circular pearl buttons which fit easily through the buttonholes.
And so I now have a new technique as well as two preemie cardigans ready to go off in my next parcel to Needles and Hooks, Angels and Preemies