Create high-impact half page banners in minutes. The largest standard display ad format, designed to stop the scroll. Templates, drag-and-drop editor, HTML5 export.

Create your 300x600 banner free at wizard.viewst.com

What is a 300x600 Half Page Banner?

The 300x600 pixel banner, officially called the Half Page or Large Rectangle by the IAB, is the largest standard display ad format. It's classified as a high-impact unit and is often placed in premium positions alongside or within editorial content on publisher websites.

The 300x600 is one of the fastest-growing ad sizes in digital advertising, driven by higher viewability scores and premium placement availability. Publishers frequently offer it as a flagship unit, commanding higher CPMs in exchange for a format that delivers exceptional brand exposure.

300x600 banner specifications

• Dimensions: 300 x 600 pixels

• IAB name: Half Page or Large Rectangle (IMU)

• Orientation: Vertical

• Max file size (HTML5): 150KB (Google Display Network)

• Supported formats: HTML5, GIF, PNG, MP4

• Common placements: Sidebar, inline content, premium above-the-fold

• Best for: Brand awareness, premium placements, high-impact campaigns

Why the 300x600 is the Highest-Impact Standard Display Format

The largest standard canvas

At twice the height of the 300x250 medium rectangle, the half page gives you room to tell a story. You can stack a brand logo, a compelling hero visual, a product shot, supporting copy, and a strong CTA, all within a single ad unit, without feeling cramped or cluttered.

Premium inventory and high viewability

The 300x600 consistently achieves higher viewability scores than smaller formats. Its large size means it's visible even when partially in view, and publishers typically place it in prominent positions, often in the right rail alongside the main content area, ensuring strong exposure throughout a user's visit.

Stand out in a cluttered environment

On pages where users are used to ignoring standard 300x250 banners, the 300x600 breaks the pattern. Its size is impossible to ignore, making it particularly effective for product launches, seasonal promotions, and retargeting audiences already familiar with your brand.

Works well with animation

The tall canvas is ideal for sequential animation, a technique where the creative tells a multi-step story in a single banner. Viewst's AI Instant Animator applies intelligent motion across every layer, turning a static design into a compelling animated HTML5 ad.

How to Create a 300x600 Banner with Viewst

1. Step 1. Select a template or start from blank. Open Viewst and select the 300x600 format. Browse the template library, filtered by industry (ecommerce, SaaS, finance, travel) and campaign type (awareness, retargeting, product launch), or start from a blank half page canvas with your brand colors and fonts.

2. Step 2. Build your creative. Drag and drop your product images, upload your logo, set typography from 1,000+ available fonts, and arrange layers to create a visual hierarchy that guides the eye toward your CTA. Add animation with one click using AI Instant Animator. Collaborate in real time with your team for fast review and sign-off.

3. Step 3. Export and go live. Export your 300x600 as a compliant HTML5 archive for Google Display Network, programmatic DSPs, and premium publisher ad servers. Also available in GIF, PNG, and MP4. Then use AI Smart Resize to generate every other size you need in seconds.

Build Your Entire 300x600 Ad Set Without the Production Bottleneck

AI Smart Resize

Design your 300x600 once, then instantly generate your full ad set: 300x250, 728x90, 160x600, 320x50, and more. Viewst adapts layout and spacing intelligently. No manual resizing.

AI Instant Animator

Apply professional-grade animation to your half page banner automatically. Viewst sequences entrance effects, text motion, and transitions to create HTML5 ads that feel intentional.

Feed-based variants

Connect a product feed and generate a unique 300x600 banner for each product. Essential for ecommerce retargeting campaigns running hundreds of SKU-level ad variations.

Approval workflows

Share review links with clients or stakeholders. Lock brand assets. Get sign-off without email chains. Viewst keeps brand fonts, colors, and logos locked during collaboration.

300x600 Banner FAQs

What is a 300x600 banner ad?

The 300x600 is the Half Page ad, the largest IAB standard display format. At 300 x 600 pixels, it's sold as premium inventory by publishers and delivers higher viewability and engagement than smaller formats. It's one of the fastest-growing display ad sizes.

Why is the 300x600 called a "Half Page" ad?

The 300x600 is called a Half Page because on many standard publisher layouts, it occupies roughly half of the page's vertical real estate in the sidebar column. This large footprint gives it premium placement characteristics and explains its high viewability scores.

What's the difference between a 300x600 and a 300x250?

The 300x600 is twice as tall as the 300x250, giving you more creative space for messaging. The 300x250 (Medium Rectangle) has wider inventory availability and lower CPMs, while the 300x600 commands premium placements and higher engagement rates.

Can I create an animated 300x600 HTML5 banner in Viewst?

Yes. Viewst's AI Instant Animator adds professional animation to every layer of your design and exports a fully animated, network-compliant HTML5 archive. You can also customize animation timing manually if preferred.

Does Google Ads accept 300x600 banners?

Yes. Google Display Network supports the 300x600 half page format as an accepted ad size. Viewst exports HTML5 archives that meet Google's technical requirements, including file size limits and animation duration guidelines.

Further reading

• Display ad production automation: how Viewst eliminates manual resizing and versioning when scaling 300x600 ad sets.

• How to build HTML5 display ads in Viewst: a closer look at building animated HTML5 half page banners.

Create your 300x600 banner today

Join 17,000+ brands producing display ads with Viewst. Free to start, no design skills needed. Start at wizard.viewst.com.