If you don't intend to use tablet mode:

https://www.amazon.com/mCover-Pixelbook-Chromebook-compatible-released/dp/B07D6F25TH/ref=sr_1_3?s=electronics&ie=UTF8&qid=1529011565&sr=1-3&keywords=pixelbook+case#customerReviews

I use this one and get on alright with it:

https://www.amazon.com/Google-Pixelbook-Leather-Carring-Laptop/dp/B076LJHP1W/ref=sr_1_9?s=electronics&ie=UTF8&qid=1529011639&sr=1-9&keywords=pixelbook+case

Plus a whole bunch of other 12" memory foam padded ones you can buy for peanuts :)