Cast on with 8mm needles held double to get a loose cast-on edge.
Working 3 repeats plus edging (instead of the 5 repeats as for a lace weight yarn). It looks gorgeous and it will definitely be wide enough.
So far I used 25g and have about 30cm length (without the magic of blocking). So it will be at least 120cm long, but I guess, I’ll get a good 10cm more out of it with blocking.

Blocking measurements: 166cm x 60cm

As usual I use the smaller needle for wrong side rows to balance my looser purl sts.