It’s and it’s dead easy - knit 10 rows for a garter border
then knit and purl 4 rows - making sure on the purl side you do 6 knit stitches at each end for a garter border.
then it’s knit 6, purl 4 knit 4 all the way across until knit 6 at the end.
purl side is k6, purl to k6 for border. For every row.
do that for 8 rows
then the knit and purl 4 rows and then knit 6, purl 4 knit 4 with the knit border and the purl side same as before.
then the knit & purl 4 rows and repeat until it’s the right sort of length, ending with the k and p 4 rows. Then knit 9 rows for the border. Cast off.
the very small size is 88 stitches - but as long as you take off 12 stitches for the border it’s just 8 stitches related.