Ws05 Headphone case?

Looking for a hard case or a soft one?
Price range?

Sorry but I'm not sure what this model headphones look like?

Thanks!
Jeff

Ideally a small hard case, like what's made for the back phones. They are not made, though. So a semirigid case would be fine. Would prefer something under fifteen dollars. These fold in on themselves to a pretty tight package, but the ear cups don't twist, so something shaped like a half circle case is the best that can be done, I think.