This clip is 16mm long. They do another very similar looking clip which is 22mm long. The clip is commonly used for boot and tailgate linings.
10x Audi Boot & Tailgate Lining Metal Trim Panel Clips- Interior Trim Clips
10x Audi Boot Tailgate Lining Metal Trim Panel Clips- Metal Interior Trim Clips
VW AUDI BOOT TAILGATE TRIM PANEL LINING UPHOLSTERY METAL SPRING CLIPS INTERIOR
FIT AUDI BOOT/ TAILGATE DOOR CARD & STEP COVER PLASTIC FASTEN STUD CLIPS
