Car Magnets for Your Business: A Moving Billboard on a Budget

A magnetic sign turns your daily commute into free advertising, and it costs a fraction of a vehicle wrap. No paint prep, no adhesive residue, no commitment. Just slap it on for the workday and peel it off at night if you want to keep your personal car looking personal.

This guide covers the practical stuff: what size actually fits a car door, how these magnets hold up through a Canadian winter or a Texas summer, when you want removable versus permanent, and how to design something people can actually read as it drives past.

Standard sizing for doors, and what actually fits

Most sedan and truck doors comfortably fit a 12x18 inch magnet. That's the workhorse size for a business name, logo, phone number and maybe a tagline. If you've got a van or a larger truck door, 24x12 or even 18x24 gives you room for a short service list without feeling cramped.

Measure your actual door panel before ordering, not just the car model in general. Trucks vary a lot, and a magnet that's too big will curve over body lines and lift at the edges, which looks sloppy and invites peeling in wind.

• 12x18 in: most common, fits most car and small truck doors
• 24x12 in: wider format, good for a longer business name or slogan
• 18x24 in: larger vans, more room for services or a QR code
• Order in pairs for both doors, matched design flipped correctly for each side

Weatherproof by default, not by upgrade

Car magnets live outside. Rain, road salt, UV, temperature swings from -20 to 40 C, all of it. The vinyl print stock used for magnets is waterproof and UV laminated so colors don't fade or wash out after a few months of daily driving.

Magnetic sheeting itself is weather-stable too, but it does have limits: it needs a clean, flat, steel body panel to grip properly. It won't stick to aluminum panels, fiberglass, or most modern truck tailgates. If you're not sure, a fridge magnet test on the panel tells you in two seconds.

• Waterproof, UV-resistant vinyl print, built to handle rain and sun without fading
• Works on flat steel body panels only, not aluminum or fiberglass
• Wipe the panel clean before applying so dirt doesn't scratch paint under the magnet
• Lift and reposition monthly to avoid a faint outline forming on the paint

Removable vs permanent: pick based on how you use the vehicle

Magnets are removable by design, that's the whole point. If the car doubles as your personal vehicle on weekends, or if you lease it and want zero trace when the lease is up, magnetic signs are the obvious choice.

If the vehicle is 100 percent dedicated to the business and never used otherwise, a permanent vinyl decal actually looks cleaner (it sits flush, no lifting at highway speed) and lasts longer without needing repositioning. Magnets make sense for flexibility, decals make sense for a vehicle that's always working.

Design for someone glancing at 40 mph, not reading a menu

You've got about 3 to 5 seconds before your sign disappears from someone's view. That's not enough time for a paragraph. Lead with what you do, in the biggest words on the magnet, then your phone number just as large, then everything else smaller.

High contrast reads faster than a pretty gradient. Dark text on a light background (or the reverse) beats a busy photo background every time. Keep it to one main message: business name, one line of service, phone number. That's it.

• Business name and one core service, nothing else competing for attention
• Phone number in a font at least 2 inches tall on a 12x18 magnet
• High contrast colors: dark on light or light on dark, avoid mid-tone on mid-tone
• Skip small print, fine detail, or long taglines, they're invisible at speed
• Upload artwork at 300 DPI so edges and text stay crisp at full size

Ordering: proof first, then print

Every order gets a free digital proof before anything goes to print, so you catch a typo or a color that looks off before it's on a magnet stuck to your truck for the next two years. Pricing scales with size and quantity, and shipping is free on every order across the US and Canada with no minimum to hit.

If you're also ordering stickers or labels for the same job (think window decals to match your car magnets), custom die-cut stickers start around 55 USD (73 CAD) for a run of 50 at 3 inches, so bundling a small sticker run with your magnet order is easy on the budget.