Car magnets for business: sizes, design and care guide

Check that the magnet will actually stick

Not every vehicle panel is magnetic. Many modern vehicles use aluminum, fiberglass or plastic for some body panels, and magnets will not stick to them. Some trucks and vans have aluminum bodies entirely.

Test before you order. Take a strong fridge magnet and try it on every panel you plan to use, pressing it near the center and near the edges. If it slides off or barely holds, a car magnet will not work there.

Then check the shape. Car magnets need a flat, smooth area. Deep body lines, trim, door handles and strong curves create gaps where air can get under the magnet at speed. Measure the flattest area on each door and note the height and width.

Heat and cold also matter. In very hot climates, a magnet on a dark vehicle in direct sun can soften and lose some grip. In freezing weather, moisture under the magnet can freeze. Neither is a reason to avoid magnets, but both are reasons to remove and inspect them regularly.

Choose a size that fits the flat area

Leave at least 1 in of flat metal around the magnet on every side. A magnet that overhangs a body line or a trim edge loses grip and can fly off at highway speed. If the flat area is smaller than you hoped, choose a smaller magnet and simplify the design rather than forcing a larger one.

On vans with large flat sides, the bigger sizes give room for a larger name without crowding, but the same rule applies: stay clear of ribs, seams, fuel doors and handles.

Decide what goes on the magnet

A car magnet is read at a glance, in traffic or in a parking lot. It is not a brochure. Stick to five elements at most.

• Business name or logo, the largest element.
• The service in plain words, such as Plumbing, Mobile Dog Grooming or Home Cleaning.
• One contact detail, usually a phone number or a short web address, not both.
• A trust detail where relevant, such as a license number for trades that require one.
• A service area or tagline only if space allows.

Licensed trades should check whether their state or city requires a license number on vehicles. Include it clearly if so, since customers often look for it.

Resist the urge to list every service. A plumber who adds drains, water heaters, remodels, gas lines and emergencies to a door magnet ends up with a list nobody reads at 30 mph. Pick the service that brings the most valuable calls, or a broad category, and let the website or business card fill in the rest.

A QR code rarely works on a moving vehicle, but it can work on a rear magnet seen in parking lots. If you add one, keep it at least 3 in wide and link to a page built for phones.

Design for road distance

Other drivers see your magnet from a car length or more, often at an angle. Letter height matters more than style.

On a 12 × 24 in magnet, make the business name or service at least 2.5 to 3 in tall and the phone number at least 2 in. Use bold sans serif typefaces and high contrast, such as white on a deep color or black on white. Avoid thin lines, photos and small taglines. If you need the name, service and number all to read clearly, those three lines should fill most of the magnet.

Think about the vehicle color. A white magnet on a white van looks like a sticker and can blend in. A dark or bold background frames the message and makes the magnet look intentional. Match the colors to your business cards so customers recognize you when you arrive.

Symmetry helps too. If you use two magnets, place them at the same height on each side, measured from the bottom of the door or a body line. Mismatched heights are noticeable across a parking lot and make the vehicle look less professional.

Follow a simple care routine

Car magnets are simple, but they need care to protect both the magnet and the paint underneath.

• Apply to a clean, dry, cool surface, and never over wax that is still wet.
• Press it on flat from one edge to the other so no air is trapped.
• Remove the magnet regularly, ideally every day as the manufacturer advises, and wipe both the vehicle and the magnet back.
• Take it off before automatic car washes.
• Store it flat, not rolled tightly or folded, and away from heat.
• Avoid leaving it in the same spot for months, since paint can fade unevenly around it.

The regular removal matters most. Moisture and grit trapped under a magnet can mark the paint, and regular cleaning prevents that.

Inspect the edges each time you remove the magnet. A lifted or curled edge lets wind catch underneath, which is how magnets are lost on highways. If an edge will not lie flat after cleaning, replace the magnet.

Magnets, decals or wraps

Car magnets are not the only way to brand a vehicle. Each option suits a different situation.

Magnets suit personal vehicles used for work, since they come off after hours, and businesses that are testing vehicle advertising. Adhesive decals on windows or panels suit work vehicles that are branded full time and where magnets will not stick. Full wraps suit fleets that want maximum visibility, but they cost far more and are a longer commitment.

If your doors are aluminum, a window decal can be a workaround. The wall and window decals page lists options, though check your local rules on window coverage for vehicles before applying anything to side or rear glass.

Budget and flexibility often decide. Magnets are the lowest commitment: you can order a pair, try them for a season and change the design when your offer changes. If you later brand a vehicle permanently, the magnet becomes a proven starting point for the decal or wrap, since you already know what reads well on the road.

A worked example

A mobile dog groomer drives her own SUV to appointments and uses it on weekends. She tests the doors with a fridge magnet and they hold, but the rear hatch is plastic.

She orders two 12 × 24 in magnets for the front doors. Each reads Paws and Suds in 3 in letters, Mobile Dog Grooming at 2 in, and a phone number at 2.5 in, in white on teal. She skips a web address to keep the design clean. She removes the magnets every Sunday evening, wipes the doors and the magnet backs, and puts them back on Monday morning. Customers who see her at a client's house get a business card in the same colors.

After three months, she notices several new clients mention seeing the SUV parked outside a neighbor's house. She adds a question to her booking form asking how clients heard about her, so she can tell whether the magnets keep earning their place before she reorders.

Get the free Small Business Print Planner

Inside the free Small Business Print Planner you will find a printable yearly calendar, where a yearly magnet inspection fits neatly, along with a quote comparison sheet and an order checklist. Replace magnets before cracks or fading make them look tired.

Car magnet checklist

• Test every panel with a fridge magnet.
• Measure the flattest area and leave 1 in of margin on every side.
• Limit the design to name, service and one contact detail.
• Make key text at least 2 to 3 in tall with strong contrast.
• Add a license number if your trade requires it.
• Remove and clean the magnet and the panel often, daily if you can.
• Take it off before automatic car washes.
• Compare sizes on the car magnets page before ordering.