I bought this one couple of days ago:

Golla Shel

Atleast verkkokauppa.com sells them.

Size is pretty good for Jolla. Fast shaking moves can and will make the phone fall out of the bag.

Protects the screen and the body from scratching, but might not be good for a rough usage. Still looking for a padded protective bag that i can keep in my work jacket. (Croco Chocolate phone bags seem nice)