LetsGoDigital has published some fantastic artistic renders of Xiaomi's upcoming foldable device, which could end up being called the Xiaomi Dual Flex, the Xiaomi MIX Flex, or something completely different. The device in the renders certainly catches the eye with its sophisticated look and somewhat slender profile. But the images also show a facet of the foldable that could end up bothering some users.
https://www.notebookcheck.net/Expertly-created-renders-of-Xiaomi-s-foldable-device-are-superb-but-highlight-one-potential-issue.406571.0.html
It seems that making a protective case for this device would be impossible.
if we don't assume this concept is Note9 or S9 size when closed, then it reasonably sized for average hand sizes. folded...it looks to be nearly like a typical 5" screen smartphone.