I worked this in the round, this was worked on size 6 double pointed needles using DK weight yarn. A small circular needle could be substituted
I am a rather tight knitter. I don’t have a gauge for you, and I can’t promise if worked exactly as written it will fit your 16 to 18 inch doll, you will have to use your own judgment and test sizing on your own doll. This is just how I made this skirt and I am sharing this pattern with you to experiment with and change if needed to fit your doll.