This is our favourite bag for small projects! With a flat bottom, this little bag stays upright and keeps your yarn contained when you're on-the-go. It holds one big yarn cake, but the best use for this bag by far is any project that uses two or more balls of yarn, because you can run your yarn strands between the snaps at the top.
We personally adore this bag for making two-at-a-time Magic Loop socks, because we can have two balls of yarn sitting in the bag, with each strand coming out either side of the snaps. It fits the yarn and the socks, and everything stays super organized and tidy while we knit!