I am writing a pattern for a simple sweater with a simple shape and a gauge of 18 sts / 10 cm (4 inches). I’ll publish it as Cook a Wolf later.
I usually knit several versions when writing a pattern, and one of the versions of this sweater has a decorative rib edge that combines a normal rib with a zig-zag rib from Barbara Walker’s Treasury of Knitting Patterns. Walker calls this rib “rick rack ribbing”.
Here is the bottom edge of my sweater with the decorative rib. When I use normal rib, I usually use 10% fewer stitches for the rib than for the body. With this decorative rib, I use the same number, as the rick rack stitches are constantly crossing over, and that draws in the edge.
The rick rack stitches are actually a mini-cable, so the zigzagging look comes from the fact that the stitches are crossed. There are only two rounds, but they are difficult to explain in words, so I’ve made videos showing these stitches. They are shown for working in the round. The videos only show the special stitches, in the picture above, they are surrounded by purl, knit, purl.
Round 1: knit the second stitch through the back loop, then knit the first stitch:
Round 2: knit the second stitch through the front, then knit the first stitch:
It can be a bit difficult to get the needle through the front of the second stitch. I hold the stitches from the back, that makes it easier.
Repeat the two rounds.