Vehicle Wraps: Parked, Not Moving
A QR code on a wrapped vehicle is scanned when the vehicle is parked — at events, on forecourts, at the curb, or in the company lot — from 2 to 5 meters away. This constraint shapes everything: codes aimed at moving traffic are a safety hazard and, in many jurisdictions, a legal problem, so size and place the code for stationary viewing only. The good news is that vehicle panels are enormous, so the large codes this use case demands look proportionate rather than oversized.
The 10:1 Rule of Thumb
At 3 m, the rule of thumb suggests 300 mm. That sounds large until you see it on a van's sliding door, where it reads as a confident graphic element rather than a billboard. Treat 250–300 mm as the working range for vehicle livery viewed at 2–4 m. Smaller codes (around 150 mm) can work on cars displayed at events where visitors approach to 1.5 m, but they will not survive curbside distances — match the size to the viewing scenario, not the vehicle.
Recommended Size
Print at 300 × 300 mm (about 12 inches) on the flattest available panel — typically the rear quarter or the sliding door. Keep the code at standing eye height so pedestrians scan comfortably without crouching or stretching. On box trucks and trailers with vast flat sides, you can go larger still; the 10:1 rule scales without penalty, and bigger codes forgive more.
Substrate and Printing
Wraps use cast vinyl film, printed by solvent, latex, or UV large-format printers, heat-conformed to the bodywork and protected by a laminate. The laminate adds years of durability but also glare — a matte or satin laminate scans far more reliably than high-gloss, which turns the code into a mirror in direct sun. Calendered vinyl is cheaper but shrinks and suits only flat surfaces; specify cast vinyl for anything with curves.
Placement and Practical Tips
- Flat panels only: doors, rear quarters, tailgates. Never wrap a code over wheel arches, door handles, fuel flaps, or deep body creases — compound curves distort modules unpredictably.
- Keep the code clear of panel gaps and door shuts; the graphic shifts microscopically every time a door opens, and a code straddling a shut line will eventually misalign.
- Short URLs are mandatory. Dense symbols at 3 m are unforgiving, and there is no second chance with a drive-past viewer.
- Tell the story next to the code: "Scan for a free quote" outperforms a naked symbol by a wide margin.
- Remember both sides of the vehicle get seen — but one well-placed code per side is enough.
Common Mistakes
- Designing for highway scanning. A code nobody can safely scan is a liability, not marketing — and it may be illegal.
- Letting the code cross panel gaps or door shuts where alignment shifts with use.
- High-gloss laminate under direct sun, turning the code into a mirror exactly when the vehicle is most visible.
- Encoding a long URL with campaign parameters; the resulting dense symbol fails at exactly the distances vehicles are viewed from.