Banner sizes: every standard banner ad format

The IAB standard sizes prevailed because publishers build their ad slots around them, ad servers ship them as defaults, and every network can traffic them without a conversation. Google Ads, the social platforms and the email clients then added their own dimensions on top, which is why a complete set today runs to 38 formats rather than the half dozen a display campaign strictly needs.

The table below is generated from the live format catalogue, grouped by channel. Every row links to a detail page with the placement, the design notes and the proportions of that specific size.

Not every format matters equally. If you can only produce a handful, produce these — they cover the large majority of bookable display inventory, and each one fills a slot the others cannot.

Google Ads accepts two different things, and mixing them up is the most common reason an upload gets rejected. Uploaded image ads use the IAB sizes above: you supply a finished design at fixed dimensions and it runs in matching slots on the Display Network. Responsive display ads and Performance Max campaigns want image assets instead — pictures without embedded text that Google combines with its own headlines and descriptions and crops to whatever placement it finds.

For responsive campaigns the required ratios are landscape 1.91:1 (supply 1200×628), square 1:1 (1200×1200) and portrait 4:5 (960×1200), plus logo assets square 1:1 (300×300) and landscape 4:1 (1200×300). Because Google crops these per placement, keep the subject centred and away from the edges, and leave the text to Google — a headline baked into the image will collide with the one Google overlays.

Practically, that means a Google Ads campaign wants both kinds: the fixed IAB sizes for image ads, and the ratio-based assets for responsive and Performance Max. Both are included in the Display package, and the download contains a separate Google Ads pack so you are not hunting for the right files at upload time.

Image ads in display networks are usually capped at 150 KB per file, and Google Ads rejects anything larger — this is the single most common technical failure when uploading a set. Responsive assets in Google Ads may be up to 5 MB, social networks generally accept several megabytes, and newsletter images should stay under roughly 100 KB because an email client loads every image in the message at once.

PNG suits designs with flat colour, logos and text; JPG suits photographic content and gets you under 150 KB when PNG will not. GIF only makes sense for simple animation. WebP, AVIF and SVG are still rejected by many ad systems and are unreliable in email clients, which is why myfeedr delivers PNG and JPG for every format — both variants, so you can pick whichever passes the check.

Many formats share a proportion. 300×250 and 336×280 are both roughly 6:5; 728×90 and 970×90 are both very wide strips; 1080×1920 and 960×1200 are both tall. Design once per ratio and the same composition can be set into several sizes without redrawing anything.

That is exactly how myfeedr generates a set. It distinguishes stacked layouts for tall boxes, compact layouts for mobile strips and wide layouts for leaderboards, then computes font sizes from the box dimensions and the actual length of your text so nothing is cut off. Where a channel has interface overlays — Stories and Reels cover roughly the top 250 px and bottom 340 px of a 1080×1920 canvas — the safe zone is respected automatically.

To work out which of the standard sizes a given ratio lands on, or to convert a ratio into concrete pixels, the aspect ratio calculator at imagenimble does the arithmetic for you.

Beyond the IAB list, some markets keep their own standards. In German-speaking markets Panorama (980×120) and the Wallpaper combination (800×250 across the top plus 160×600 on the right) are still routinely booked, and both are part of the Display package.

Social and email add proportions that exist nowhere else: 1080×1080 for Instagram feed, 1080×1350 for portrait posts, 1080×1920 for Stories and Reels, 1200×630 for Facebook, 1200×627 for LinkedIn feed and 1584×396 for a LinkedIn page banner, 1600×900 for X, 1000×1500 for Pinterest and 1280×720 for a YouTube thumbnail. Newsletters are the strictest of all: 600 px wide is the working standard, with 1200 px versions for retina displays.

Need a size that is not in this list — a marketplace tile, a partner placement, a one-off crop? For those single adjustments a browser tool is quicker than a full set: the social media resizer at imagenimble resizes locally on your machine, without upload and without an account.