Work a ribbed band to 2 rows before the bottom of the buttonhole position, ending on a right side row. *With wrong side facing, work number of sts to the buttonhole opening. Join new yarn (shown shaded here in cream), work to end of row, turn. Work to the buttonhole opening, cross the 2 yarn ends (as...
For a 3(4, 5) st buttonhole. Work to where you want the buttonhole to begin, bring the yarn to the front, slip the next stitch purlwise, and then return the yarn to the back. 1. *Slip the next stitch. Then on the right needle, pass the second stitch over the end stitch. Repeat from * 2 (3, 4) times....
Working into edge half-stitch of the knitted piece, *bring tip of threaded needle in and out of a knitted stitch, place working yarn under needle tip, then bring threaded needle through the stitch and tighten. Repeat from *, always bringing threaded needle on top of working yarn.