Tauri Rugged Defender Case ($8)
Tauri is known for thin and cheap TPU cases, but lately, they've started offering cases with a little more protection. If you're looking for an extremely rugged case that isn't too thick this one is worth checking out.
The company uses a soft TPU inner core and a hard polycarbonate plastic on the outside of the phone. That outer shell is scratch-resistant too. Meaning both your phone and case should stay looking new for a long time. It's soft, smooth and comfortable to hold with just the right amount of texture.
Get it in Black, Purple or Rose Gold for under $8.