I used one skein on MadelineTosh Tosh Merino Light in Coquette with size 6 circular needles. My finished shawl is 21” deep and 78” across the top. The lacy edging is about 4 1/2”.
This shawl is worked from the top center to the outer edging, which means a small cast on and a large bind off.
I love this soft yarn, but it is a splurge. Thus shawl would be lovely in any yarn you choose.