Material guidelines

DISPLAY ADVERTISING

Ready-made image assets with clear dimensions.

Display ads are delivered as ready-made static image assets. Panorama and Leaderboard formats require separate desktop and mobile versions.

Ad format	Desktop	Mobile	Files
Panorama	980 × 400 px	320 × 320 px	JPG, PNG, WebP
Leaderboard	728 × 90 px	320 × 100 px	JPG, PNG, WebP
Content ad	300 × 250 px	300 × 250 px	JPG, PNG, WebP
Half-page ad	300 × 600 px	—	JPG, PNG, WebP
Mobile banner	—	320 × 50 px	JPG, PNG, WebP

01

File

JPG, PNG or WebP
RGB colour space
Maximum 300 kB / file

02

Destination URL

Working HTTPS address
UTM parameters are allowed
Provide a URL, not an HTML link

03

Responsiveness

The desktop image is not cropped into the mobile version
Panorama and Leaderboard require separate versions
Images are not normally upscaled

DESIGN TIP

Give important elements enough breathing room.

Keep logos, the main message and other essential elements far enough from the edges. In particular, treat the 980 × 400 px and 320 × 320 px Panorama versions as separate layouts.

NATIVE ADVERTISING

Provide the content. The media handles the layout.

With native advertising, you do not supply a finished banner. Mediatomaatti builds a commercial placement from the material to fit the selected media property’s visual style.

NATIVE AD

Required materials

Advertiser name: required
Headline: recommended 45–65, maximum 80 characters
Description text: recommended 90–140, maximum 180 characters
Main image: recommendation 1200 × 628 px
Destination URL: HTTPS
CTA: when needed, maximum 28 characters
Logo: optional
Alt text: optional

PRODUCT OR SERVICE PLACEMENT

When the destination is a clear commercial offering

Suitable, for example, for a service, product, app, online service, event, booking flow or downloadable guide.

Advertiser name, headline and description
Main image, recommendation 1200 × 628 px
HTTPS destination URL and CTA
Optional logo and classification, such as Service or Event

If a placement includes a price, offer or other changing information, the advertiser is responsible for its accuracy and currency.

The advertising label is added by the Mediatomaatti system.

The advertiser does not need to include the “Ad” label in the image material for a native ad.

Commercial content is published with clear commercial identification.

The implementation can be, for example, an article, guide, interview, Q&A content or another jointly designed format.

We typically need

Advertiser name
Content topic and objective
Background information and source material
Images and optional logo
Optional CTA and destination URL
Up-to-date product, service, price and other commercial information

MAIN IMAGE

1600 × 900 px

Recommended production master.

Minimum recommendation 1200 × 675 px

The image is optimised at publication for the selected media property and different screen sizes.

COMMERCIAL CLAIMS

Claims must stand up to scrutiny.

Prices, offers, health claims, research claims, comparisons and other factual commercial information supplied by the advertiser must be accurate.

Mediatomaatti may request sources or other evidence to support claims. We may request changes or decline to publish material that we consider misleading, unsupported or otherwise incompatible with the principles of the selected media.

SPONSORSHIP

Section, theme and media sponsorships are designed case by case.

A sponsorship package can combine sponsor labels, logos, display advertising, native placements and sponsored content.

Sponsorship does not automatically give the advertiser control over the media’s editorial content. The commercial relationship is made clear to the user.

IDENTIFIABILITY

Advertising should look like advertising.

Mediatomaatti is responsible for the technical recognisability of advertising in its own publishing systems.

Display and native advertising are labelled as advertising. Sponsored content and sponsorship solutions are labelled in a way appropriate to the implementation, for example with a Ad– or Commercial collaboration label and the advertiser name.

The advertiser does not need to build Mediatomaatti commercial labels into finished image assets unless separately agreed.

RESTRICTIONS

What we do not accept in standard advertising solutions.

We intentionally keep advertising technology controlled. An ad does not need unrestricted access to the user’s browser in order to work.

Unrestricted JavaScript code

Iframe ads

Third-party ad tags

Flash or other executable code

Ads that automatically play sound

Forced redirects

Pop-ups and overlays that prevent use

Interstitials without a close option

Ads that imitate system messages

Fingerprinting and cross-site tracking in advertising material

HTML5, video and other special implementations are currently outside the standard material requirements. Any special implementation is agreed separately.

MATERIAL DELIVERY

You receive a campaign-specific material request.

The delivery date is agreed as part of the campaign. Submit material early enough for review and any necessary revision round.

1
Choose the implementation
The media, formats and campaign structure are agreed.
2
You receive a material list
We tell you which images, texts, links and device versions are needed.
3
We review the material
Dimensions, files, links and content are reviewed as needed.
4
Published
Approved material is scheduled according to the agreed campaign.

WE CHECK WHEN NEEDED

The technical and content basics.

The file format and file size
Image dimensions
The destination URL
Desktop and mobile versions
Native text lengths
The recognisability of commercial content
The suitability of the material for the selected media property

ASK RATHER THAN GUESS

You do not need to know the technical vocabulary of ad formats.

Tell us what you are doing and we will help choose the right implementation and specify exactly which materials are needed.

Contact us