Closed feather stitch is a variation of feather stitch which can be used to fill an area or as a decorative pattern filling when worked in multiple rows. You can also use it to couch thick or textured thread, fine cord or narrow ribbon to the surface of a fabric.
The stitch is worked downwards between two parallel lines. It may be useful to mark guide-lines on the fabric before you start to sew.
This stitch is worked with the same hand motions of feather stitch but the needle is inserted vertically, rather than at an angle.
Bring the needle out at the top left line, and insert the needle on the right line and make a small vertical stitch in a downward motion, so that the needle point reappears on the right line. Keeping the thread under the needle point pull the thread through the fabric to make the stitch.
Next, insert the needle on the left line, and make a small stitch vertical stitch in a downward motion so that the needle point reappears on the left line, and keeping the thread under the needle point, pull the thread through the fabric to make the stitch. Work these movements alternatively down the row.
There are many other stitches that are classified in this group. The stitches that I have listed here in the Buttonhole family are: