Digital Ad Sizes for Nonprofit Advertising Campaigns

Running digital ads can be a great way to build awareness, grow your email list, promote an event, or boost donations. But one of the first questions that always comes up is: What size should the ads be?

The good news is, you don’t need a massive list of file sizes or dimensions to be successful. With just a few well-chosen sizes for social media and Google Display, you can make sure your creative looks great everywhere it shows up.

We put together this handy guide to the most commonly used ad sizes for social media and Google Display Network. You can bookmark it, share it with partners, and use it to streamline your next ad request. Easy.

Social Media Ad Sizes

These three ad sizes will set you up for success across most social platforms like Facebook, Instagram, and TikTok. From feeds to Stories, they’re designed to make sure your content appears polished and professional.

1. 1080 x 1080 (Square)

This classic 1:1 ratio is the most widely used social ad size and displays cleanly across Facebook and Instagram feeds on both desktop and mobile. 

Best for: Facebook and Instagram feed posts and ads

2. 1080 x 1350 (Portrait)

This vertical 4:5 format takes up more screen space as someone scrolls, which often results in better visibility on mobile devices.

Best for: Instagram and Facebook feed posts with a vertical layout

3. 1080 x 1920 (Full Screen / Story)

This is the standard size for full-screen vertical content and fits perfectly in Instagram and Facebook Stories or Reels.

Best for: TikTok, Instagram and Facebook Stories or Reels

Google Display Ad Sizes

When you’re running display ads through Google, these six sizes will cover the most popular placements across websites, mobile apps, and search pages. They’re the ones most commonly supported and most likely to deliver results.

1. 336 x 280 (Large Rectangle)

This is a strong, versatile size that fits well inside or at the end of blog posts and news articles.

Best for: In-content placements on websites

2. 728 x 90 (Leaderboard)

This wide horizontal banner usually appears at the top or bottom of a webpage and is commonly used on desktop.

Best for: Website headers and footers

3. 250 x 250 (Square)

Compact and flexible, this size is often placed in sidebars, small content areas, or mobile layouts.

Best for: Website sidebars or small ad blocks

4. 120 x 600 (Skyscraper)

This tall, narrow format is designed to sit alongside long columns of content, often in the right-hand sidebar of a website.

Best for: Sidebar placements on desktop websites

5. 320 x 50 (Mobile Banner)

One of the most common mobile ad sizes, this slim banner is typically placed at the top or bottom of the screen within mobile apps or mobile websites.

Best for: Top or bottom of mobile screens

6. 320 x 100 (Large Mobile Banner)

Similar to the mobile banner, but with extra vertical space to help your message stand out. This size is also popular for mobile-friendly placements.

Best for: Mobile site headers or footers

Wrap-Up: Use the Most Popular Ad Sizes for Effectiveness & Efficiency

Here’s your nonprofit-friendly ad size checklist:

Social Media:

• 1080 x 1080 (Square)
• 1080 x 1350 (Portrait)
• 1080 x 1920 (Full Screen / Story)

Google Display Network:

• 336 x 280 (Large Rectangle)
• 728 x 90 (Leaderboard)
• 250 x 250 (Square)
• 120 x 600 (Skyscraper)
• 320 x 50 (Mobile Banner)
• 320 x 100 (Large Mobile Banner)

These sizes give you everything you need to run a successful campaign across Facebook, Instagram, and Google without overcomplicating things.