I love the name of this stitch it is called Long Raindrops. Love easy stitch to do.It reminds me of when I used to knit ribs when I was a child.
CAST ON
Aran weight 5mm needles cast on 20 stitches
DK weight 4mm cast on 24 stitches
Rows 1,2,3,4 - *k1,p1* until the end of the row
Rows 5,6,7,8, - *p1,k1* until the end of the row
repeat row 1 - 8 until your work measures 4" cast off