This is not just a scarf. Spin-a-Boa is a beautiful accessory in 3 versions. The "plain" version is knit in DK yarn, the beaded version is also DK, the picot frilled version I did in 4ply. In reality you can follow this pattern with any weight yarn and the appropriate sized needles.
 
So, drape it, ruffle it , twist (or spin) it , wear the ends at the front or at the back, wear it long or short. But whatever you do, don't miss it and do enjoy it!