I have purchased the button but haven't actually sewn it on yet.
I also have the buttons for the other two cardigans. They're not sewn on either. This one will take 6 pearl-like buttons.
The pattern is Sunnyside Cardigan by Tanis Lavallee and is knit from the top down. The instructions are not for a beginning knitter. They are a bit sketchy and could be very confusing to a non-experienced knitter. However, this pattern could be used as a template for almost any top-down cardigan with a lace pattern along the raglan seam and down the fronts. I'm hoping this sweater will be closer to 3 - 6mo. size.