2011: I'm trying to figure out what to do with my very short hair this year for This Is the Place. I wondered if a snood might be my answer. I wanted to be sure, though, before I did anything dumb, so I sent Liz Clark my question.
Of course she replied in very good time; and not only that, she put a full post regarding snoods on her site!!
Basically -- in a very brief nutshell, the "snood" part is really the ribbon, not the net, and a snood is something that would really be worn by the upper classes, not the working classes. So, a snood may not be the thing for me.
2013 update: According to some new Facebook friends from the Civilian Civil War Closet group, the net should be very close in color to one's own hair.
Here is a good picture of a hair net with ribbon from my new Facebook friend Isabella G. (used with permission).
Also, here's one from Ashley Goldsmith's Etsy shop.
I hear you can also find them at Sally Beauty or the Maddhatter or Victorian Lace on Facebook for around $1.00.