Totallee just released their super thin cases for the iPhone 8 and iPhone X. They are available and ready to ship within 24 hours. They are some of the thinnest cases you can get, and are available in a thin plastic or leather option.
The BookBook case would by all accounts be the flagship product of Twelve South. They continually update it, year after year, for nearly all of Apple’s products. This latest iteration has a few design changes that are very much appreciated, as it is modified to work with the new MacBook Pros.