Adding a border

When the border is finished, knit a few rows in stockinette stitch in a different color.

Remove the needle and iron the stockinette stitch so that the stitches do not unravel.

Pin the edge to the knitting, distributing the stitches evenly.
Unravel the rows of stockinette stitch, leaving the last one.
Unravel the last row as you sew from the right side of the work.

Stitch from the wrong side to the right side of the work in the center of the 2nd stitch, stitch back into the 1st stitch and come out on the right side of the work in the center of the 3rd stitch.
Stitch back into the 2nd stitch.

Keep it up this waybackstitchinguntil the last stitch.