This seemed like an easy project, so I didn't bother measuring...that was a mistake, because after I'd gathered my scarf, it was too short to drape nicely. If you'd like to make your own scarf, I'd suggest starting with a rectangle of fabric approximately 70 to 100 inches long and 10 inches wide. After cutting, I finished the long edges using the rolled hem foot on my sewing machine. It gives a great neat finish, but can be tricky to use.
Because my fabric was too short to tie and drape, I folded over one short end and stitched it down to create a loop for securing the scarf around my neck. Not elegant, but it works. To finish the remaining short end, I folded it over twice and stitched it down. Here's a better photo of the finished scarf. I will have to go back to secure my ruffles (oops), but otherwise I like it and will probably make a few others in solids or other prints.
Can't wait to re-do my gathers properly and start wearing this. Love autumn!