The Complete Guide to Google Ads Banner Sizes in 2025

Key Takeaways: Google Ads Banner Sizes

• Desktop Ad Sizes: Making Ads Stand Out on Big Screens
• Mobile Ad Sizes: Getting Attention on Small Screens
• Responsive Display Ads: Fitting Different Spaces
• Design Tips for Google Ads Banners!
• Technical Stuff for Google Ads Banners
• Smart Ways to Run Google Ads Banner Campaigns
• New Trends in Google Ads Banner Sizes for 2025

In 2025, Google Ads banner sizes are really important for digital marketing success. As a Google Ads agency, we know how picking the right banner sizes can help more people see and click on your ads. Let's look at the best banner sizes for your campaigns, based on what's working well now.

Desktop Ad Sizes: Making Ads Stand Out on Big Screens

When it comes to ads on computers, some sizes work better than others. Here are the top desktop ad sizes for Google Ads in 2025:

1. Medium Rectangle (300 x 250): This size is really versatile and works well on many websites. It fits nicely with text and catches people's eyes. As a B2B PPC agency, we often suggest this size because it blends in well but still gets noticed. In 2025, people are making these ads more interactive to get more clicks and sales.

2. Large Rectangle (336 x 280): This is a bit bigger than the medium rectangle and gives you more space for your message. It's good for ads with lots of text or when you need to show more details about what you're selling. Lately, advertisers have been using this extra space to add small infographics or compare products.

3. Leaderboard (728 x 90): This long, thin banner usually goes at the top of web pages, so it's one of the first things people see. It's great for making people aware of your brand. Our insurance PPC agency clients often use this size to grab attention quickly. In 2025, we're seeing more of these ads that move or change based on what the user does, making them more personal.

4. Half-Page Ad (300 x 600): This tall ad is becoming more popular because it gives you lots of space to tell a story with your ad. It's really good for ads that use pictures to tell a story and can get more people to engage with your ad. Many brands are using this size to create ads that really connect with people and make them feel something.

Mobile Ad Sizes: Getting Attention on Small Screens

With more people using phones to browse the internet, it's really important to make your Google Ads work well on smartphones and tablets. Here are the best mobile ad sizes for 2025:

1. Mobile Leaderboard (320 x 50): This small banner fits well at the top or bottom of phone screens. It works on many different phones and apps. In 2025, these ads are getting smarter - some can grow bigger or react when you swipe, making them more fun to use without getting in the way.

2. Large Mobile Banner (320 x 100): This is twice as tall as the regular mobile leaderboard, so you have more room for your message without taking up too much of the phone screen. It's really good for making landing pages work better on phones. Advertisers are using this size to show short videos or let people try out products right in the ad.

3. Square (250 x 250): Square ads work well on phones because they fit easily into apps and mobile websites. They're a good mix of being noticeable without being annoying. Recently, this size has become popular for ads that look like they're part of social media feeds.

4. Interstitial (320 x 480): While not a regular banner size, these full-screen ads that show up between pages or when you open an app have become really important for mobile ads. In 2025, we're seeing these ads become more creative, with games or other fun things to do that make people want to interact with them.

Responsive Display Ads: Fitting Different Spaces

In 2025, responsive display ads are really popular because they can change their size and look to fit different ad spaces across Google's network. The technology behind these ads has gotten a lot better, making them even smarter at adapting:

Good things about responsive display ads:

• They automatically fit different ad spaces, now with smarter AI that adjusts the layout
• They work on all kinds of devices, even new ones like smart displays and wearables
• They save time because you don't have to make lots of different ad sizes
• They work better because they learn and adjust based on how people react to them
• They can change their content based on who's looking at them, making the ad more personal

To make good responsive display ads, use high-quality pictures, interesting headlines, and clear descriptions. This lets Google's AI mix and match your stuff to make the best ads for different places. In 2025, it's a good idea to give the AI lots of different things to work with, like short videos and interactive parts, so it can make even more interesting ads.

Design Tips for Google Ads Banners

Making Google Ads banners that look good and work well is really important. Here are some updated design tips for 2025:

• Keep designs simple: Don't put too much stuff in your ad. In 2025, people like ads that focus on one main message or picture.
• Use good pictures: Choose pictures that match your message and look good to the people you want to reach. Make sure they're clear and the right size for each ad type.
• Don't use too many words: You don't have much space, so make every word count. Use short, powerful messages that clearly say why someone should buy your product or use your service.
• Match your brand: Make sure your ads look like they're from your company, using the same colours, fonts, and style of talking that you use everywhere else.
• Tell people what to do next: Use a clear call-to-action (CTA) like "Learn More," "Shop Now," or "Get Started" to tell people what to do after seeing your ad.
• Add some movement: Using a little bit of animation or things people can interact with in your ad can make more people interested. But be careful not to make the ad too slow to load or hard to use.
• Make it work for dark mode: Many people like using dark mode on their phones and computers, so make sure your ads look good in both light and dark settings.
• Make it easy for everyone to use: Design your ads so that everyone can understand them, including people who might have trouble seeing. Use colours that are easy to see and add descriptions for pictures.

By following these design tips, you can make Google Ads banners that look great and work well for your campaigns in 2025.

Technical Stuff for Google Ads Banners

When making Google Ads banners, there are some technical things you need to know to make sure your ads show up right and work well. Here are some important technical points for 2025:

File size: Keep your banner files under 150 KB so they load fast. This is really important for people using phones who might have slower internet.

Image types: Use JPEG for photos, PNG for graphics with see-through backgrounds, and GIF for simple moving pictures. You can also use HTML5 for more complex, interactive ads.

Making ads fit different spaces: When you make responsive display ads, give Google different shapes of pictures so your ads look good in different places. The best shapes to use are square (1:1), wide (1.91:1), and really wide (4:1).

Working on all screens: Test your ads on computers, tablets, and phones to make sure they look good on all of them. This is important to make sure your brand looks the same everywhere.

Loading fast: Make sure your ads load quickly because people don't like waiting. Use good coding for HTML5 ads and make your pictures and animations smaller without making them look bad.

Making ads everyone can use: Make sure your ads follow the rules for accessibility. This means adding descriptions for pictures and using colours that are easy to see.

Interactive parts: If you add parts people can click on or play with, make sure they follow Google's rules. Make it clear what people can click on and try not to make people click by accident.

Adding videos: If you want to put videos in your ads, make sure they follow Google's rules about what kind of video files you can use, how good the quality should be, and how long they can be.

Smart Ways to Run Google Ads Banner Campaigns

To make your Google Ads banner campaigns work really well in 2025, it's important to be smart about how you run them. Here are some good ideas:

1. Find the right people: Use Google's tools to show your ads to the people who are most likely to be interested. If you're selling to other businesses, think about using B2B PPC strategies to reach people who make decisions in those companies.

2. Keep testing and improving: Try different banner sizes, designs, and messages to see what works best. Use A/B testing to compare different versions and make choices based on what the results show.

3. Check how well your ads are doing: Look at things like how many people click on your ads (CTR), how many of those clicks turn into sales or sign-ups, and how much money you're making compared to what you're spending on ads (ROAS). Use this information to make your campaigns better.

4. Focus on what's important for your business: Make sure your banner campaigns help you reach your business goals. Whether you want more people to know about your brand, get more leads, or make more sales, set up your campaign to support these goals.

5. Work with other marketing: Make sure your Google Ads banners match what you're doing on social media, email, and other places online. This helps create a consistent experience for people who see your ads.

6. Make ads personal: Use technology that can change your ads to fit different groups of people. In 2025, AI is getting really good at making ads that change based on what each person likes and does online.

7. Be careful with people's information: People are worried about their privacy online, so be careful with how you use their data. Try to use information people give you directly and look for ways to show ads that don't need personal information.

8. Think about phones first: Since most people use their phones to go online, make sure your ads look great on small screens. This means thinking about things like making buttons easy to tap with your thumb and using vertical videos for phone users.

New Trends in Google Ads Banner Sizes for 2025

As we look to 2025, there are some new and exciting things happening with Google Ads banner sizes:

1. New sizes: While the old sizes are still important, we're seeing new, bigger ad formats. These might include ads that stretch across the whole width of a webpage or full-screen ads that give you more room to be creative.

2. Interactive ads: As technology gets better, we're seeing more ads that you can play with. This could include mini-games, ways to customise products, or even augmented reality experiences right in the ad.

3. AI-made ads: Artificial intelligence is getting really good at making ads. In 2025, we expect to see AI tools that can create and improve ads automatically based on how people react to them.

4. Video in banners: With more people liking video content, we're seeing more banner ads that include short videos. These can range from simple moving pictures to full videos that play when you interact with them.

5. Ads that blend in: Banner ads are starting to look more like the websites they're on, so they don't stand out as much as ads. This means new sizes and styles that fit in better with the content around them.

6. Voice-activated ads: As more people use voice assistants, we're starting to see ads that you can talk to. These ads might respond to voice commands, offering a new way to interact with them.

7. Augmented reality (AR) ads: As AR technology becomes more common, we're seeing banner ads that can show digital things in the real world through your phone's camera. This opens up new ways to show products or create fun brand experiences.

Wrapping Up: Mastering Google Ads Banner Sizes in 2025

Choosing the right Google Ads banner sizes is crucial for making your adverts perform well in 2025. Whether they’re viewed on desktops or mobiles, each size has its advantages for capturing attention and engaging with people. By understanding the essentials, following sound design principles, and staying updated with the latest trends, you can create banners that stand out in today’s competitive online spaces.

The key to success is continuous testing, refining, and using data to inform your decisions. Whether you’re reaching out to businesses or everyday consumers, tailoring your strategy to utilise the most effective banner sizes will help you stay ahead. Personalising adverts with AI, incorporating interactive elements, and exploring immersive formats can provide exciting opportunities to connect with your audience in meaningful ways.