A smoke ring is a long cowl that is knitted in very fine yarn, lace or fingering yarn. You can pull it up and over your head for a hood instead of using a scarf. My daughter-in-law doesn't wear scarves or hats said she would wear a smoke ring if it was knitted in very fine yarn.
Salmonmac said"Sounds like a wonderful project. Knitting a few rows straight is a good idea with so many sts and such fine yarn. Love to see a picture of the finished ring."
When I get it it finished I will take a picture of it and upload it.