CO Desired width -5cm using long tail method.
Ch2, 4 Tb in end (mark 2nd tb as edge st), Tb in each st to other side. 5 th in starting loop to turn ( Mark 3rd tb as edge st) tnrw in other side of co chain and join to 1st tb as if it’s a stitch.
Use 7mm hook with tripled 8ply
Use 8mm hook with super chunky

Continue in desired stitch pattern until you reach the length you want.