The Raspberry Pi foundation have done a great work on the design of official Raspberry Pi Zero case.
It is suitable for all three models of Raspberry Pi Zero board:
Raspberry Pi Zero V1.3: https://www.cytron.io/p-rpi-zero
Raspberry Pi Zero W: https://www.cytron.io/p-rpi-zero-w
Raspberry Pi Zero WH: https://www.cytron.io/p-rpi-zero-wh
It comes with a base (red color), 3 types of top cover/lid (solid, camera and GPIO), a short camera FFC cable for Rpi Zero CSI interface, and 4 rubber bumpers.
Get it here: https://www.cytron.io/p-bo-rpi-zero