Dishrag scarf

Ok so I thought I was gonna be smart and make a scarf like the dishrags that start with just a few c/o sts and then the pattern goes like this:
k2 yo knit to last 2 yo k2
then the next row you just knit
got it, well I’ve gotten as far as I want the width to be but cannot remember how to keep it that width, I was thinking maybe something like:
k2 yo k2 tog knit til last 2 yo k2
knit all sts in next row
any suggestions?

increase one side and decrease the other.

thank you that’s exactly what I was looking for!