Banner sizes for web, email, ads and every network

What are the standard banner sizes?

The standard banner sizes come from the place a banner runs. An ad network, an email platform and a social network each fix their own. A website has no standard size, because its layout decides.

Printed banners are measured in feet

A printed banner is sized in feet or inches, so its pixels depend on the print resolution. 4over4’s banner guide asks for artwork at 150 DPI at full size. That suits a banner read from 10 feet or more. Up close, the guide asks for 300 DPI. At 150 DPI, a 2 × 4 foot banner needs 3,600 × 7,200 pixels.

Website banner size: as wide as your layout

A website banner has no standard size, because your theme or page builder sets its frame. A full-width banner spans the browser window. So make it at least 1920 pixels wide, the width of a Full HD screen. StatCounter’s figures for September 2026 put 1920 × 1080 first among desktop screens, at 28.07%.

The height is your choice. We made ours 1920 × 600, a 16:5 strip that leaves the page below in view. Blinkimg’s engine at Auto saved it as a JPG of 82.9 KB. The WebP was 48.6 KB and the AVIF 39.5 KB.

On your own site you pick the format, so a WebP or an AVIF can carry the banner. Ads and emails give you less choice: neither Google’s ad specifications nor Mailchimp’s help names WebP or AVIF.

Banner ad sizes Google and the IAB list

Banner ad sizes come from two lists: Google’s sizes for uploaded image ads, and the IAB’s fixed-size units. Eight sizes are on both.

Google’s 20 sizes

Google Ads takes an uploaded image ad at 20 sizes, its uploaded display ads specifications say. They fall into four groups, from the 300 × 50 mobile banner to the 300 × 1050 portrait. Each file must be a GIF, JPG or PNG of 150 KB or less. Its regional table ties 980 × 120 and 250 × 360 to Sweden, 930 × 180 to Denmark and 580 × 400 to Norway. It also adds 3 billboards, 750 pixels wide, for Poland only.

The most common web banner size

The most common web banner size is 300 × 250 pixels, first on Google’s list for computers. That list, on its help page on responsive display ads, names 9 sizes. After 300 × 250 come 336 × 280, 728 × 90, 970 × 90, 468 × 60, 300 × 600, 160 × 600, 250 × 250 and 200 × 200.

The same page’s list for phones starts with 300 × 200, 300 × 50 and 300 × 100. Two of those, 300 × 200 and 300 × 100, are not on the upload list. A responsive display ad covers them instead.

The IAB’s fixed sizes

The IAB’s New Standard Ad Unit Portfolio recommends fixed-size banner units as well. It chose them from a study of which units “contribute to the majority of revenue”. Each unit has a first-load weight limit, up to 250 KB for the billboard and the portrait.

The IAB counts that weight after gzip compression, and works out each unit’s pixels at 2x, double density. Of the IAB’s banners for computers and smartphones, only its 120 × 60 unit is missing from Google’s list.

What is the right email banner size?

The right email banner size is 600 pixels wide, the width Mailchimp’s templates are built for. Its help page on template images says they are “generally designed for a maximum width of 600 pixels”. Mind the padding: with 10 pixels on each side, Mailchimp says to make a header image 580 pixels wide.

Mailchimp gives no height. We made ours 600 × 200, a 3:1 strip that keeps the message near the top. Mailchimp also advises full-sized images over shrunk ones, so they stay sharp on retina screens. So we rendered the same banner at twice the pixels, 1200 × 400.

Save a photo banner as a JPG. The PNG came out about 3 times larger at both sizes. Even the 1200 × 400 PNG, at 139.4 KB, sat far under the 1 MB Mailchimp recommends.

Banner sizes on X, LinkedIn, Facebook, YouTube and Discord

Every social network sets its own banner size and shape, from 16:9 on YouTube to near 6:1 on LinkedIn. Each figure comes from the network’s own help page, read on 2 October 2026. Our social media image sizes cheat sheet lists every other placement.

Each of these banners has a page that crops a picture to it:

• Twitter header size
• LinkedIn banner size
• Facebook cover photo size
• YouTube banner size
• Discord banner size

YouTube’s banner also has a small safe area for text. Our post on what size is a YouTube thumbnail draws it.

Will your banner fit under 150 KB?

Our photo banner fit under Google’s cap at every ad size, even at a high quality. The largest file we saved, the 300 × 1050 portrait, came to 82.8 KB. That is 55% of the cap.

How we tested

We cropped our 9.8 MB camera photo to each size. A dark band carries the words “Summer at the Lake”. Chromium set the words in Inter at the largest size that fits. Blinkimg’s engine saved each render as a JPG, with Max file size at 150 KB. The IAB’s 120 × 60 got its own 50 KB.

A PNG passed too, because the engine’s PNG keeps 256 colours. The largest PNG, 300 × 1050, reached 79.2 KB.

Stricter and looser limits

The IAB is stricter at the small end. Its smartphone banner gets 50 KB at first load, a third of Google’s cap. Our 320 × 50 came to 10.2 KB.

Most social banners have looser limits, in megabytes, as the network table shows. The Facebook cover is the tight one. Our cheat sheet cropped the same photo to 851 × 315. That JPG was 28.7 KB, inside the size Meta says loads fastest.