This is a case designed specifically for the 4-USB Hub HAT available on Amazon. (Link below) It is a snug fit, with all ports except the GPIO accessible. Because of the design of the hub, all the ports are slightly shallow. Because of this, the walls of the case don't interfere with their use.

***The Hub from Amazon comes with acrylic cover plates and hardware to attach it to the RPi Zero. This case is designed to use that hardware. If the link doesn't work, the Amazon ASIN is B01ISTC9JY.

*** Be careful with how much you tighten said hardware, as it is plastic and it isn't difficult to strip the screws. (Which I did)

*** .stl files updated to the latest versions with proper dimensions

*** Edited to: - Increase some tolerances that were too tight - Eliminate the awkward gap at on the bottom part, caused by difference in wall dimensions - Add hole for CPU heat sink - Add cutout around micro-USB power port