---
# System prepended metadata

title: Best Google Display Ad Sizes for 2025
tags: [google ads, agrowth]

---

# Best Google Display Ad Sizes for 2025

In 2025, display advertising remains one of the most scalable ways to expand reach, reinforce brand visibility, and drive conversions across Google’s ecosystem. But as competition increases and placements diversify across mobile, desktop, apps, and connected devices, one factor matters more than ever: choosing the right ad sizes.
On the Google Display Network (GDN)—which reaches more than 90% of global internet users—the size of your creative directly influences impression volume, viewability, click-through rates, and even cost efficiency. This guide breaks down the most effective Google Display Ad sizes for 2025, the logic behind each format, and best practices for selecting the right mix to maximize ROI.

Why Display Ad Sizes Matter in 2025
Choosing the correct ad dimensions is not merely a design choice; it is an optimization decision that shapes how often—and where—your ads appear. In a network as large as GDN, ad size affects three core performance drivers:
1. Visibility and Reach
Publishers prioritize standardized sizes to maintain consistent layouts. When advertisers use highly supported dimensions, their ads naturally earn more placements. Google’s internal benchmarks show that sizes such as 300×250, 728×90, and 320×100 make up the majority of available inventory across the network.
2. Engagement and CTR
Ads that match the flow of surrounding content perform better. For example, medium rectangles placed within or between paragraphs often achieve higher engagement because they feel native to the page layout. Meanwhile, oversized formats like 300×600 deliver strong impressions due to their dominant visual presence.
3. Conversion and Brand Impact
Larger or more premium sizes—such as 970×250 billboards—are ideal for storytelling, product showcases, and campaigns where creative depth improves conversion intent. These placements also reinforce brand memory through repetitive exposure in high-visibility areas.

Comprehensive List of Google Display Ad Sizes
Google supports dozens of ad dimensions across standard image banners, responsive formats, app placements, and companion video units. Below is a structured overview to help advertisers prioritize effectively.

Standard Image Ad Sizes
Static and animated banners remain a core component of display advertising. The following are the key formats still widely supported across publishers in 2025:
300×250 (Medium Rectangle) — Versatile, best overall performance on both desktop and mobile.


336×280 (Large Rectangle) — Strong in-content visibility and engagement.


728×90 (Leaderboard) — High desktop visibility across the top of pages.


320×100 (Large Mobile Banner) — Opportunity for stronger mobile CTAs.


320×50 (Mobile Leaderboard) — Ubiquitous across mobile inventory.


300×600 (Half-Page Ad) — Tall, high-impact option ideal for brand message depth.


250×250 / 200×200 (Square Formats) — Flexible placements in compact areas.


970×250 (Billboard) — Premium visibility on large screens.


468×60 (Standard Banner) — Legacy size still common across mid-tier publishers.


160×600 (Wide Skyscraper) — Strong for sidebar visibility and scroll engagement.


These formats dominate the bulk of GDN inventory and provide the most consistent ROI for advertisers who want predictable delivery and performance.

Responsive Display Ad Formats
Responsive Display Ads (RDAs) continue to gain adoption due to their flexibility. Google automatically adjusts RDAs to fit available placements using the following core aspect ratios:
Recommended Dimensions
Landscape (1.91:1) — 1200×628 px


Square (1:1) — 1200×1200 px


Portrait (4:5) — 960×1200 px


RDAs help advertisers maximize reach without manually uploading dozens of variants. However, supplying high-resolution images is essential for maintaining visual clarity across different screen sizes and device types.

Mobile and App-Specific Ad Sizes
Mobile-first design is now the norm. With more than half of global ad impressions served on smartphones, advertisers should prioritize mobile-optimized formats:
320×100 (Large Mobile Banner) — Best mobile CTR.


320×50 (Mobile Leaderboard) — Most widely supported mobile unit.


300×250 (In-App Rectangle) — Effective inside mobile apps.


320×480 / 480×320 (Interstitials) — Full-screen ads ideal for high-impact storytelling.


414×736 / 736×414 — Optimized for larger phones and hybrid tablet-phone screens.


These formats perform well for app promotion, mobile remarketing, and conversion-driven campaigns where screen real estate matters.

Video Companion and Display-Linked Sizes
For advertisers running YouTube or video-focused campaigns, display companion banners reinforce messaging around the video player:
300×250 (Companion Banner)


336×280 (Large Rectangle Companion)


728×90 (Leaderboard Companion)


970×250 (Billboard Companion)


300×600 (Tall Companion Format)


These static creatives run alongside in-stream ads, extending brand exposure while users watch video content.

Best Performing Google Display Ad Sizes in 2025
Based on industry benchmarks, platform-wide data, and campaign performance patterns, several formats consistently outperform others in reach and CTR:
1. 300×250 — The High-Performance Standard
Highest inventory availability


Strong CTR


Works across desktop and mobile


2. 336×280 — In-Content Powerhouse
Larger canvas boosts visual clarity


Best used in articles and editorial placements


3. 728×90 — Premium Desktop Visibility
Top-of-page placement improves brand recall


Ideal for headline-driven offers


4. 300×600 — High-Viewability Format
Dominates sidebar area


Strong for storytelling and product features


5. 320×100 — Mobile CTR Leader
Perfect balance between visibility and UX


High conversion relevance for mobile users


Advertisers who focus on these five formats typically achieve stronger cost efficiency and broader inventory flexibility.

Best Practices for Choosing Display Ad Sizes
To increase viewability and optimize spend, advertisers should follow a strategic mix of formats rather than relying on a single dimension.
Upload Multiple Sizes
Diversifying your creative set ensures that your ads can appear across more publisher placements, maximizing impressions.
Balance Fixed and Responsive Formats
Combine RDAs with standard banners to control visual quality while still benefiting from responsive adaptability.
Prioritize Mobile-First Inventory
Analyze device reports—if more than 60% of impressions come from mobile, prioritize mobile-friendly ad sizes.
Test Creative Variations
Run A/B tests on imagery, color, CTA placement, and headline length. Banner fatigue is real, and creative refresh cycles matter.
Keep File Sizes Light
Google recommends keeping image files below 150 KB. Fast-loading ads improve user experience and Quality Score.

FAQs
Which ad sizes perform best overall?
The top performers are 300×250, 336×280, 728×90, 300×600, and 320×100 due to their widespread inventory support and high CTR.
What is the best size for mobile?
The 320×100 Large Mobile Banner consistently delivers the best results for smartphone traffic.
Should advertisers use responsive ads or fixed sizes?
The best approach is both. Fixed banners allow for brand-controlled design, while RDAs maximize reach across unexpected placements.
What are the required image ratios for responsive ads?
Advertisers should include landscape (1.91:1), square (1:1), and portrait (4:5) for best coverage.
What is the maximum allowed file size?
Image ads must not exceed 150 KB to ensure fast loading and platform compatibility.

Recommended Resources for Google Display Ad Sizes
[Google Display Ad Sizes Guide](https://agrowth.io/blogs/google-ads/google-display-ad-sizes)
 A detailed breakdown of supported banner dimensions and optimization tips for display creatives.
[Google Ads Video Specs](https://agrowth.io/blogs/google-ads/google-ads-video-specs)
 A complete overview of YouTube and Google Ads video requirements, including formats, lengths, and resolutions.
[Rent Google Agency Account](https://agrowth.io/pages/rent-google-agency-ads-account)
 A high-trust Google Ads agency account solution offering stronger ad stability, lower suspension risk, and flexible billing.