Aww those are really cute!!! I think that is 5/8" ribbon, judging the comparison right next to the 3/8" lined clip.
It looks like this fold: http://makebowsandmore.blogspot.com/...llys-clip.html
but with the tails a bit longer. You can make a 2" wide rectangular template out of cardboard and put a slit up the center and wrap the ribbon as shown in that blog post.
I'd like to try these too. I have tons of 5/8" satin that I bought when I first started making bows (what was I thinking???)