Have made several of these. First was made using Bali Pops Strips - love their color combination choices. The second bag is a WIP from my stash, a "someday" gift for a friend, put it up just to show anyone how it goes together.
I don't exactly follow the pattern - found a few easier tricks that work for me.
These are shower curtains grommets, available in 2 sizes & various colors. This is my shopping bag; havealso used it as a carry-on bag & take-along bag for projects.