I bought this case for it; actually ended up getting the case before I got my phone:
https://www.amazon.ca/gp/product/B0747ZLTJB/
Slim enough to not really affect the bulk. The one good/bad thing is the lip of the case extends a couple of mm above the screen. So while that may help protect it from landing the wrong way and getting damaged, it does cause me to "fat finger" a few things.
Keep in mind it has a glass back to support wireless charging, so there's another risk I didn't want to take. Speaking of wireless charging, I got this charger:
https://www.apple.com/ca/shop/produc...-base?fnode=42
They had this and the Belkin one in the store, and I tried both. Belkin seems to be it's usual craptacular self. I had to position the phone just perfectly to start charging. The Mophie one is far more forgiving.