The i-cord alone is used to make a cord. Use it for a purse, or for any time a long rope is needed. Do it this way: using double-pointed knitting needles in a size that works for your yarn weight, cast on 4.
See my page if you need help casting on.
Slip those 4 stitches to the opposite end of the needle and knit them. The yarn will be coming from the opposite end of the stitches which wraps around to make the cord. Do this over and over for as long as you need the cord to be, then bind off. (Watch the video.)
Knitter Elizabeth Zimmerman gets the credit for this simple idea.
Below is a video (not mine) showing how to begin, knit and bind-off the i-cord. It’s a bit slow and tedious, but that could be good for beginners.
How to Create An I-cord Edging
The i-cord edging neatens up the edge of a project. Like in my photos above of something I began knitting a long time ago. This would work on a scarf, blanket, dishcloth (good practice piece) or any place you want a nice edge.
But I couldn’t remember how I made that edge. And I can’t find info for edging like this anywhere. I think I’ve figured it out, as I knit a few more rows using this yarn. It’s the same basic idea as the i-cord – the yarn has to come from behind.
At the end of the row (whatever your pattern is) slip the last three stitches with the yarn in front. This means you should include extra stitches at both edges which will be knit and slipped.
Slip them purlwise and the yarn will end up in the back for the next row, where they will then be knit (all three stitches) before carrying on the main part of the project.