All you need to make these throws is about 2 yards of your fabric wool or wool/cashmere fabric and enough premade fringe (see source below) to sew across the width of the fabric twice. Most wool fabric is about 58" inches wide, so you would need about 4 yards of the fringe.
We hemmed the edges of our wool and then attached the fringe, so if you can sew a straight line, you can make these throws. (By the way, Martha told Fashion Editor Katie Hatch that they reminded her of the ones Hermes makes.)
Resource: Frinezza fringe in stone, gray, and yellow, $43 per yard, Shindo, 212-868-9311