Top 5 Car Magnet Sizes That Work for Any Business

Using car magnets is one of the easiest and most affordable ways to advertise your business while you’re on the move. Whether you’re parked outside a client’s house or driving across town, a well-designed magnet can turn your vehicle into a mobile billboard. But before you order, you need to decide on the right size.

The car magnet size can make or break your promotional campaign. Pick a dimension that’s too small, and people might miss your message. Too big, and it might not fit your vehicle properly or look awkward. To help you decide, here’s a breakdown of the five most popular car magnet sizes, along with some tips on how to use each one effectively.

1. 24" x 18" – The Go-To Standard

This is the sweet spot for most businesses. Big enough to be seen from across a parking lot, but still easy to hang on most doors. If you're only getting one magnet size, this is a safe option

Tip: Print your logo on one side and place your contact details on the other side. Don’t cram everything — leave some breathing room around your text.

Common usage: Landscapers, plumbers, and real estate agents often use this size to create promotional tool that includes their name, phone number, and a short tagline (e.g., Free Estimates or Call Today).

Visibility and Impact

Consider how visible the magnet needs to be. Larger magnets are more noticeable from a distance, making them suitable for cars and larger surfaces. Smaller magnets work well for closer, more personal interactions.

Tip: Use bold, high-contrast colors. Smaller magnets need to pop visually to be noticed.

Common usage: Great for dog walkers, tutors, or local service providers who just want to display their name and number in a non-intrusive way

3. 24" x 12" – Wide and Clean

Think of this size as a bumper-sticker upgrade. It’s great for long business names or web addresses, especially if your design has a sleek, horizontal layout.

Tip: Avoid stacking multiple lines of text — stick to a single line for an impactful message. Consider using your website or a short tagline like “On-Time. On-Budget. Always.”

Common usage: Ideal for delivery service providers and contractors who want a magnet that blends in with their vehicle’s shape but still delivers a clear message.

4. 24" x 24" – Bold and Square

This is your “go big or go home” option. A large square magnet gives you more space to include multiple design elements: a large logo, a short list of services, and contact info — all without making the layout look cluttered and overwhelming.

Tip: Use columns or boxes to separate your content. These design elements make it easy to read the message from a distance.

Common usage: Perfect for food trucks, mobile detailing, or contractors who want to list services (e.g., Drywall • Painting • Flooring) in a clean, organized way.

5. 18" x 18" – Neat and Balanced

This one’s underrated. The square shape offers symmetry, which can be visually appealing especially if your brand has a circular logo. It’s also a great secondary magnet to place on the rear door or trunk.

Tip: Use this size for a focused message. For example, you can print just your logo and phone number. This minimalist design helps reinforce your branding.

Common usage: Ideal for photographers, stylists, or mobile repair techs who want something clean and professional that doesn’t take up too much space.

Final Tips

Choosing the right magnet size can make a big difference in the way people see your brand. So, before you order, take a few minutes to measure your vehicle and plan your layout. A well-designed and appropriately sized magnet looks more professional and helps you create an impactful, memorable message.

No matter what size you pick, keep the design clean, the text readable, and make sure it fits the shape of your vehicle. When done right, a car magnet is one of the most affordable and effective ways to advertise on the move

Ready to order?

All our car door magnets are printed on high-quality 13 pt. vinyl magnetic stock that is durable enough to handle harsh weather conditions. Also, these magnets have a light gloss finish that makes your design colors pop.

Use our Easy Design Tool to preview your magnet or build your own from scratch. We also offer a Free File Review that includes proofreading your copy at no extra cost (something many competitors charge for).

Got questions? Call us at 1-888-888-4211 or message our chat support team. And while you're here, explore the rest of our site to see how else we can help promote your business.