Gauge is 18 stitches x 18 rows (measured by counting all stitches, the single crochets and the chain stitches.)

You can use any type/brand of yarn. Adjust the number of stitches and rows to your desired size.

I used Bella Baby Pebble yarn in White, 2 skeins.

Finished size
Width: 8″ (20.5cm)
Length: 50″ (127cm)

More details: https://mycrochetspace.com/crochet-moss-stitch-scarf/