What size case would fit over an iPhone 5c with an otterbox?

I have an iPhone 5c with an otter box. Not exactly sure which kind but it's got a two piece plastic case with a rubber case over it… What kind of case would fit over my otter box? I just want one of those cute fuzzy ones but I'm not sure if a iPhone 6 or 6s would work?

Added (1). I understand that phone cases are designed to go over the phone not the case but i just want to know if anyone knows if I could put one over my otterbox so I don't lose my otterboxes protection. And if no one can answer that then does anyone know if a iphone 5 or 5s case would fit on a 5c

Those cute fuzzy cases, fit over the actual phone, not the cases, because there are too many case options to design around, when the phone size is a constant.