This is based off the Flexible Pixel 3 XL case. Modified all dimensions to fit the Pixel 5, relocated buttons, fingerprint cutout, camera cutout, and microphone port. Added ports for bottom speakers.

I printed this with a 0.6 nozzle, 0.4mm layer height. It would surely look nicer with a smaller layer height, smaller nozzle, but it is incredibly tough. Printed with Sainsmart TPU in Emerald Green. I set the fill angle to 0 degrees, it creates a handsome pattern that grips the hand well.