I havent every used such thin yarn, I think it was size 10, with a size 2 hook. I also havent ever tried to change colors while crocheting, lol. It looks kinds wonky, but I imagine it might look similar to something made by Mrs. Weasly, ^_^

At the top I added a faux leather cord with a lion and a key charm. To the bottom I added some fringe

Enjoy <3