Responsive display, square units, skyscrapers, and leaderboards each have their own footprint. Describe the offer, choose the size, and generate a Google-ready banner without a design brief, sized correctly for the placement from the first draft.
Specs
These four IAB-standard sizes cover the placements the Google Display Network fills most often across partner sites and apps.
| Placement | Aspect ratio | Recommended size | Notes |
|---|---|---|---|
| Responsive display | Multiple | 1200×628, 300×250, 336×280 | Google auto-crops from your assets — supply more than one size where possible. |
| Medium rectangle | 1:1 (approx.) | 300×250 | The most-served display unit on the network; works in-content and in-app. |
| Wide skyscraper | Vertical | 160×600 | Sidebar-only; largely a desktop placement with low mobile reach. |
| Leaderboard | Horizontal | 728×90 | Header banner on desktop; copy needs to read at a glance. |
Research
Google's transparency tool covers Search, Display, YouTube, and Shopping ads, searchable by advertiser domain — there's a full walkthrough of how to use it if you're auditing a specific competitor's account.
For Display specifically, results render as a static thumbnail of the banner with no size or file metadata attached — useful for spotting a creative direction, not for matching the exact pixel dimensions a competitor is actually running. Getting an exact size usually means opening the image in an editor and measuring pixels by hand.
Limits
A file you can trace back to a specific ad size, or edit into your own campaign. It's built for disclosure, not production — you're looking at evidence an ad exists, not a template you can build from, and there's no way to export or repurpose what you find there.
Skip guessing dimensions from a screenshot. Choose a Display size directly and generate a banner built to that spec, sized correctly the first time instead of after a round of manual cropping.
Try It FreeFaster Path
Pick the size first — responsive, medium rectangle, skyscraper, or leaderboard — then describe the offer in plain language. The generator handles the layout math that display banners are unforgiving about: tiny canvases, short copy limits, and a CTA that still needs to read at a glance from across a page full of other content.
Running the same offer across several sizes at once is where this saves the most time — regenerate at each dimension without rebuilding the brief, and keep the message consistent across the whole placement set, from the smallest medium rectangle up to a full leaderboard.
Creative Tips
If 300×250 reads clearly, everything larger will too. Working backward from the biggest banner tends to produce copy that gets clipped on the smaller units, which are the ones the network actually serves most often.
Display units are too small for more than a single message — pick the strongest offer and drop the rest, even if that means leaving a secondary benefit out of the creative entirely, and trust that a follow-up ad can cover what this one skips.
Display ads sit next to publisher content, not in a dedicated feed — contrast against the surrounding page is what earns the click, more than polish or subtlety ever will, especially on a page dense with competing visuals.
Responsive display placements reward advertisers who provide square, landscape, and portrait assets rather than one fixed banner, since Google's algorithm picks whichever combination fits a given slot best.
Google FAQ
No. Google's tool is for confirming what a specific advertiser is running; this generator is for producing your own creative. They solve different problems in the same workflow, and most teams end up using both at different stages of a campaign.
300×250, the medium rectangle. It's the most widely served unit on the network and a reliable first size to generate before branching into skyscrapers or leaderboards, which see comparatively less inventory across both desktop and mobile.
Yes — the product, offer, and angle carry over between generations. Change only the size and regenerate to fill out a full responsive set, so every placement in a campaign shares the same core message.
Yes. Headlines and descriptions are generated within the space each size actually allows, so you're not manually trimming copy to fit afterward or discovering a truncated headline after the campaign has already gone live.
This generator is built for Display creative specifically. Search and Shopping ads are text- and feed-driven rather than image-based, so they fall outside what this tool produces, though the same product brief could still inform copy you write for either format.
Pick a size, describe the offer, generate. Try it free.
Try It FreeSame generator, different specs — jump to another platform's ad format.
AdLibrary.net is an independent ad generation tool. It is not affiliated with, endorsed by, or connected to Meta, Google, TikTok, LinkedIn, X or Pinterest. Platform names are used only to describe the ad formats the generator renders for.
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