Ring Stash2.0 - Slim Engagement Ring Box with Rotating Holder

The ring I have is 10mm across the halo. How much of an opening gap would there be if I used this box?

Does it rotate on its own as you open the box? Or do you have to manually turn the ring after you open the box?

Would this work with an oval diamond? Measurements: 10.75 x 7.47 x 4.63 mm

Is this case ring size specific, because i know some ring cases are for certain mm and type of setting and stuff like that?