Here's what I did:
I have a handful of these that are super cute but big.
Like SUPER SUPER big.
I took a shawl that I always wear (a size I like) and lined it up with the larger shawl. I cut about an inch away from the size I wanted to add a small hem.
I sewed a small zig zag pattern the length of the cut hem, to prevent it from unraveling. Keep the fabric really tawt on both sides while sewing as this kind of fabric can tear very easily
See those stringy things...yup that stuff can cause the whole shawl to unravel.
I rolled the hem over twice and ironed it down.
I re-sewed using a straight pattern and ironed the hem down again to remove the "bumpy" look.
They feel like new :) I can now wear my favorite scarves comfortably!!