My daughter -in-law sent me a picture of a blanket she saw in a store that she really liked. So I copied it for her.
I went to Joann's and found a nice, soft bulky yarn. Then I looked at the picture ant counted how many stitches were in the cable. I made a little practice swatch to see how many cables I would need to make a blanket the width I wanted
When I actually did the real thing, the blanket compressed with the cables so it was narrower than I prefer. But it will work.
This is one blanket that I think I'll make again. I really like it.
My Ravelry link. I have put on it basically how I created the blanket.