USPANDI Ultra-Slim Croc Skin Case
If you're looking for a case that's cheap while still giving you some style and a little protection, consider the USPANDI ultra-slim series. They're offering cases in a slew of different colors, all with a unique PU leather Crocodile skin finish.
The handmade PU leather wraps around a hard polycarbonate plastic case that snaps around the Mate 20 Pro. Just keep in mind that these are more of a "snap-on cover" than a case, and the top and bottom are both exposed a little bit.