Nice yarn, wonderful colors.
I used the needles sizes required by the pattern though the yarn was a bit chunkier; and the finished measurements are:
width 21cm x height 16cm

I bought two balls as the pattern called for 330 meters, but a single one would have been enough; that’s why I decided to add a reverse stockinette lining.

First I worked the bag in the round,
then the lining in the round,
I seamed them together on the front with a kitchener stitch and at the bottom with a whip stitch,
then I went on knitting the last part in the round: lining on one side and bag on the other.
I did only 1 row for the border

2 month later I added a little chain to hold it on the shoulder ;)