I use the yarn called ‘Otome Collection’ which is not available anymore.
It’s 85% of cotton and 15% of linen blended sports or DK weight yarn.

It’s very easy to make, I only use single crochet and chain to make this bag.

download this patten:
japanese http://atelier-mati.com/?p=4916
english http://english.atelier-mati.com/?p=1005