Mobile phones are an ingrained part of our lives. As technology evolves even more, mobile phones are developed tremendously and new features are added. If a couple of years ago the great majority of people were using computers and laptops to surf the internet and communicate with others, now mobile phones have become the main devices people use. Because they are so performant and have so many features, phones can now be used to work on projects, make video calls, surf the internet, communicate with friends, take incredible photos, and many more.

There are 5.27 billion people that use a mobile phone in the world today, and this is growing by more than 2% per year. So, it is easy to understand that mobile phones will become more and more popular, even more used than laptops or tablets. And if you are a company or business that wants to increase its brand awareness and promote its services and products, ads could be one of the solutions. But when you start working on this, taking into consideration that most of your target audience will see the ad on their mobiles, you need to choose the best size for your ad.

There are many types of ads you can choose to implement in your marketing strategy. Choosing the one that fits your goals and mission best is necessary.

Interstitial Ads

Interstitial ads are those ads that appear when you surf the internet or do any other operation online. They are usually displayed between games’ levels or when you use the browser page, and in all cases, you need to close the ad by yourself. This type of ad catches the attention of the user, especially because most of them are full-screen ads. But because the size of the phone screen is different from company to company and model to model, mobile ad sizes might be different. An ad that is full-screen is usually 320 x 480 pixels. However, you might also see interstitial ads of different sizes, such as 300 x 400 pixels or 300 x 250 pixels. Depending on the scope and objective of your ad, you can choose the size that best fits your design and purpose.

Video Ads

Video ads have become quite popular in a recent couple of years, with them expected to grow even more in the next few years. Video ads are quite popular because they are not static and in a video of 15 or 30 seconds you can send a clear message about your brand and also a call to action for your target audience. They can be the same as interstitial ads judging by the size, but this depends on the goals you have set for your ad and how you create your video. 320 x 480 or 480 x 320 pixels are the most popular sizes for ads that contain videos.

Mobile Banner Ads

This type of ads is among the most used type out there, especially because they are quite versatile and easy to set by novice advertisers. They can take many forms, from columns to boxes on the screen of the user. But studies have shown that a banner rectangle of 300 x 250 pixels is the most popular choice, and also the most effective. You can also try to add mobile banner ads that are larger than this, but you need to make sure you place them right and they will not annoy the user.

Native Ads

There are also native ads you can use to promote your business, company, services, or products. These are usually not intrusive and annoying because they appear as a promoted or suggested page or post. So, they kind of take the size of a classical post on that platform. Compared with interstitial ads, native ads do not interrupt the experience of the user. If you look for the right size for your native ad, you should know that there isn’t one. Why? Because you need to design it so that it blends in with the entire content on that page.


Mobile phones are the most popular devices around the world and the number of unique users is increasing every year. It is understandable why many businesses choose mobile ads to advertise their company; but if you want to choose the best mobile ad size, we hope this article has helped you define them.

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