What is the difference between aspect ratio and resolution?

Aspect ratio is the relationship between width and height. Resolution is the actual pixel dimensions. A file can have the right ratio but still fail delivery if the required pixel dimensions, codec or duration are wrong.

Can I reuse social or TV assets for Swedish DOOH?

Sometimes, but rarely without edits. Social assets may be too cluttered, and TV assets may use the wrong framing or pacing. Swedish DOOH works best when creative is rebuilt for the booked aspect ratio and real viewing distance.

Which ratio is safest as a master layout?

There is no universal answer, but many advertisers start with the most constrained placement in the plan, often a portrait unit. From there, they expand to wider versions while protecting the main message, logo and CTA.

Why does aspect ratio matter for placement?

Because viewing behaviour changes by environment. A portrait screen in Stockholm Central-area commuter flows or on central streets in Gothenburg and Malmö favours vertical composition and faster scanning. Wider formats can work better for distance viewing or dramatic brand visuals.

Should city differences change the creative shape?

Sometimes the shape stays the same while the edit changes. In Stockholm you may prioritise commuter clarity; in Malmö or Gothenburg, central retail and street environments may allow slightly different emphasis; in Uppsala and Lund, local relevance and concise messaging often matter. The ratio sets the canvas, but the audience context shapes the composition.

Do Nordic markets use similar logic?

Yes. Norway, Denmark and Finland also rely on a mix of portrait urban screens and wider impact formats. The planning discipline is similar: confirm each format locally, then adapt the creative rather than stretching one file across every screen.

When should aspect ratio be confirmed?

At booking stage, not the day before launch. Ask for the exact product specifications as soon as sites or networks are shortlisted, especially for large-format digital, transit and special builds.

How late can files usually be delivered?

It varies by owner and product, but Swedish suppliers commonly ask for final material several working days before campaign start. Bauer Media Outdoor and JCDecaux Sweden both publish delivery guidance at product level, so treat the booked specification as the source of truth.

What is the biggest delivery mistake?

Assuming all screens from one supplier use the same canvas. In reality, portrait Adshels, digital billboards and spectaculars can all require different dimensions. Check ratio, pixel size, animation length, file type and naming rules before exporting.

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Dictionary · OOH

Aspect ratio

Get the shape right before you build the file.

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Definition

Aspect ratio is the proportion between an ad’s width and height. In Swedish out-of-home and digital out-of-home, it is one of the first technical checks to make because it determines how creative will fit screens, posters and special builds across Stockholm, Gothenburg, Malmö, Uppsala and Lund. If the ratio is wrong, the result is usually cropping, letterboxing or wasted visual space.

Also known as:aspect ratio

Key facts

Aspect ratio in 60 seconds

Definition

The ratio of width to height, such as 16:9, 3:1 or 9:16.

It describes shape, not physical size.

Most common Swedish DOOH shape

Portrait is widely used in street furniture networks.

A frequent delivery spec is 1080 x 1920 px.

Watch-out

Custom large-format screens may use non-standard pixel dimensions.

Always check the product sheet, not just the media owner.

Closest related term

Resolution

Resolution tells you pixel count; aspect ratio tells you frame shape.

Deep dive

How it is used: Aspect ratio

What aspect ratio means in OOH

Aspect ratio describes shape, not size. A 16:9 panel and a 9:16 portrait screen can both be large, small, static or digital; the ratio simply tells you how wide the canvas is compared with its height. In practice, Swedish media owners publish formats in either ratio form, pixel dimensions or both. For example, portrait street furniture is commonly delivered as 1080 x 1920 pixels, while larger digital spectaculars often use their own custom dimensions. The key point for advertisers is simple: if your artwork is built for the wrong shape, it will not translate cleanly across the network.

Why it matters in the Swedish and Nordic market

In Sweden, campaign planning often mixes city-centre street furniture, transit, retail-adjacent screens and larger digital formats. That means one master creative rarely fits every placement without adaptation. In Stockholm, commuting environments dominate many high-frequency DOOH plans; in Gothenburg and Malmö, central streets and transport hubs drive similar requirements; and in Uppsala and Lund, student-heavy and commuter-heavy routes can reward tighter local tailoring. The same production logic broadly applies across Norway, Denmark and Finland, where buyers also combine portrait-heavy urban screens with wider roadside or impact formats.

Typical aspect ratios you will meet

The most common OOH ratios in Sweden include 9:16 for portrait digital screens, 16:9 for landscape video-led inventory, and extra-wide formats such as 3:1 for selected billboards, transit interiors or bespoke placements. A portrait ratio is especially common in digital Adshel-style networks because the screen is designed for pedestrian viewing and close reading. Large-format digital units may use custom canvases rather than a standard consumer-video ratio, so marketers should never assume that TV, social video and DOOH can share one export without adjustment.

How Swedish media owners express format requirements

Clear Channel Sweden, JCDecaux Sweden and Bauer Media Outdoor all work with detailed material specifications, but they do not always present them in exactly the same way. Bauer Media Outdoor’s Stockholm Digital Adshel is listed as portrait with a delivery size of 1080 x 1920 pixels. JCDecaux Sweden’s Digisize National product describes a network of 270 digital screens and refers advertisers to a separate material specification, while Bauer’s Digital Spectacular uses a custom resolution of 936 x 1656. The practical lesson is that aspect ratio should be checked at product level, not assumed at owner level.

Aspect ratio versus resolution

Aspect ratio and resolution are related, but they are not the same thing. Aspect ratio is the shape of the frame. Resolution is the number of pixels inside that frame. Two files can share the same ratio and still have different resolutions. For BillboardBee readers, the operational rule is: first match the ratio, then match the required pixel dimensions, file type, animation length and any owner-specific restrictions. If ratio is correct but resolution is wrong, the file may still be rejected or scaled poorly. If resolution is correct but ratio is wrong, the creative can still be cropped.

Creative implications for busy marketing teams

Aspect ratio affects hierarchy, readability and motion design. A narrow portrait unit in central Stockholm usually rewards one dominant message, one brand cue and short copy, especially in commuter environments with limited dwell time. Wider formats can support more lateral composition, but they still need a clear focal point. If the same campaign must run across Stockholm, Gothenburg, Malmö, Uppsala and Lund, it is usually smarter to design a flexible system with approved variants rather than force one artwork into every format. That reduces production friction and avoids last-minute compromises when files are delivered to different suppliers.

Budget and operations: where ratio quietly adds cost

Aspect ratio rarely changes media cost on its own, but it can affect production workload, adaptation hours and approval rounds. A single-ratio campaign is usually simpler to produce than a mixed-format buy spanning portrait street furniture, landscape retail screens and bespoke impact sites. In Sweden, where advertisers often combine national reach with city-level relevance, the real budget question is not the ratio itself but how many creative versions are needed to fit the booked network well. The more varied the inventory mix, the more important it becomes to plan format versions early.

Best-practice advice for Swedish OOH planning

Start every brief by listing the booked products and their exact aspect ratios. Build the key visual around the strictest format, usually the narrowest or most constrained placement. Keep safe zones for logos and legal lines. Test legibility for people moving through streets, stations and retail environments rather than sitting still with a phone in hand. And if a campaign will run across several Nordic markets, confirm each owner’s specification locally instead of assuming Swedish files will transfer unchanged. In OOH, aspect ratio is not a design footnote; it is part of campaign effectiveness.

FAQ

Common questions about Aspect ratio

Does aspect ratio affect media cost in Sweden?

Usually not directly. Media cost is more often driven by network, city, season, share of voice and reach. Aspect ratio matters financially because it can increase adaptation work, especially when one campaign is split across portrait, landscape and bespoke formats.

When does aspect ratio create extra production cost?

Most often when a campaign booked across Stockholm, Gothenburg, Malmö and other cities includes several product families from Clear Channel Sweden, JCDecaux Sweden or Bauer Media Outdoor. Each additional ratio can mean another export, QA pass and approval round.

How should I budget for mixed-format campaigns?

Use a production range rather than a single flat assumption. A portrait-only DOOH plan is normally simpler than a national plan mixing digital street furniture, large-format digital screens and custom placements. Ask your agency or studio to scope by number of master variants, not just by number of files.

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Related terms

Resolution

A measure of screen/creative sharpness, in pixels.

Sources & further reading

01.Statistics Sweden: 50 largest municipalities, by population 2024 · SCB, 2024-02-21
02.Statistics Sweden: Urban areas, localities and small localities 2023 · SCB, 2024-12-05
03.JCDecaux Sweden: Digisize National · JCDecaux Sverige, 2026-01-01
04.JCDecaux Sweden: Om oss · JCDecaux Sverige, 2025-05-01
05.Bauer Media Outdoor: Stockholm Digital Adshel · Bauer Media Outdoor
06.Bauer Media Outdoor: Digital Spectacular specification · Bauer Media Outdoor

Figures and market references are updated continuously. We primarily use Swedish and Nordic sources so the content reflects the market you actually operate in.

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