You’ve found the artwork. The colors work with the sofa, the price is right, and then comes the question that brings the whole purchase to a halt: should your poster be portrait or landscape? In the Swedish poster market, portrait formats are so dominant that many people never ask the question – 30x40, 50x70, and 70x100 are portrait by default, and the landscape option is just one click away. Yet orientation matters more than the choice of artwork. It determines whether the picture feels connected to the furniture below it, whether the room feels wider or taller, and whether you’ll move the hook three times before you get it right. This buying guide walks you through how to choose – starting with the furniture’s width, the clear wall space, and what proportions actually do to the eye.
Start with the furniture’s width – not the artwork
The most common mistake is making the decision in the online store instead of in front of the wall. Instead, grab a tape measure first and measure three things: the width of the furniture underneath, the distance from the top of the furniture to the ceiling or cornice, and how much clear wall space there is on either side before a door frame, curtain rod, or shelf interrupts it.
The wider of these measurements determines the orientation. A rule long used by upholsterers and gallery owners is that art above a piece of furniture should cover between half and two-thirds of its width. Below half the width, the picture looks forgotten; above three-quarters, it starts competing with the furniture. A three-seat sofa is usually 200–220 centimeters wide, giving you a target range of roughly 100–145 centimeters. No standard-size portrait poster comes close. A landscape 100x70 does the trick immediately, and two landscape 70x50 prints side by side with a six-centimeter gap add up to 146 centimeters.
The vertical axis has its own fixed point. The so-called 57-inch rule, which museums and galleries use as a starting point, says the center of the artwork should be 57 inches above the floor – 145 centimeters, which corresponds to the average eye level of a standing adult. The rule applies regardless of orientation, but it is harder on portrait formats: a 70x100 with its center at 145 centimeters puts the top edge at 195 centimeters, leaving little room under a 250-centimeter ceiling.
Quick facts: Swedish poster sizes don't come from the same system as printer paper. The A series is based on a 1:√2 ratio (1:1.414), an idea described as early as October 25, 1786, in a letter from Georg Christoph Lichtenberg to Johann Beckmann, and which Walter Porstmann turned into the DIN 476 standard, published on August 18, 1922. The system became an international standard as ISO 216 in 1975. The 30x40 format, however, has a 1:1.333 ratio, so it isn't an A format – which is exactly why it looks wider and more stable than a 50x70.
1.333, 1.4, and 1.414 – three proportions that look completely different on the wall
The differences may seem trivial on paper, but they're clear on the wall. The 30x40 format has a 3:4 ratio, the same as a classic canvas and older photographs. It feels compact, cohesive, and like a painting, and can handle a detailed subject without feeling cramped. Its landscape counterpart, 40x30, looks almost like a window.
50x70 has a ratio of 1:1.4, and 70x100 has a ratio of 1:1.428 – both are so close to the A series' 1:1.414 that in practice they behave like enlarged A formats. They're narrower and taller, which accentuates the room's height. A portrait or botanical illustration flourishes in this proportion. A wide landscape doesn't: it ends up with empty space above and below the subject instead of at the sides, making it look oddly squeezed.
21x30 is the only size in the range that's close to a true A format – A4 measures 210 x 297 millimeters. That's why this size works so well with printed posters, maps, and old documents originally designed in the A series.
"Orientation isn't an afterthought or a matter of taste – it's the first decision, and the subject is the second."
The sofa, bed, and dresser – three pieces of furniture with three different answers
Above the sofa, landscape format almost always wins. The area is wide and low, your eyes move horizontally when you sit down, and a landscape 100x70 fills the space without clashing with the backrest. If you want to keep the portrait look, an alternative is three portrait 30x40 prints in a row, which give you the same total width but a completely different rhythm.
The headboard sets the rules above the bed. A 160 cm bed with a headboard gives you roughly the same target area as a two-seater sofa, and a landscape 70x50 centered above the headboard is the safest choice. A portrait format above a bed tends to look as if it has fallen from a higher position, especially if the ceiling is low.
Above a dresser, sideboard, or hallway bench, the logic is reversed. These pieces of furniture are narrower, 80–120 centimeters, and are often placed against a wall with limited width but plenty of height. Here, a portrait 50x70 works better: it draws the eye upward, elongates the wall, and leaves room for a lamp or a vase beside it without everything feeling crowded.
Tip: Cut paper to the artwork’s outer dimensions using old wrapping paper or newspaper, and tape both orientations to the wall before you order. Leave them there for a day and walk past them at your normal pace a few times. Most people change their minds at least once during that day—and it’s cheaper to change your mind on paper.
Artworks that need width—and artworks that collapse in landscape
Some artworks have their orientation built in. Horizon lines make this clearest: coastlines, lakes, mountain ridges, and sweeping fields are composed around a line that cuts across the image, and that line needs room on either side to work. Crop the same artwork to portrait and the horizon becomes a boundary in the middle of the image instead of a movement through it. The same goes for panoramic cityscapes and still lifes with objects lined up on a tabletop. Among the nature artworks and posters featuring famous places, you’ll find the most artworks that truly benefit from landscape format.
In the other direction are artworks that need height. Portraits and figures, botanical studies of a single stem, architectural scenes with towers or stairwells, typography and quotes, and all art built around a vertical central axis lose their center of gravity when laid on their side. A tree becomes a bush. A cathedral becomes a study of a facade.
The slightly unexpected third category is abstract art, which often works in both orientations—but rarely equally well. Look at where the composition’s center of gravity is. If it sits below the center, the artwork works in landscape; if it sits in the upper third, it wants to be portrait. Many abstract works are sold in both orientations for exactly that reason, and it’s worth comparing them side by side before you choose.
Four mistakes that mean you have to replace the poster
The first thing is to choose the orientation to suit the frame you already have at home. The frame is the cheapest part of the equation and the only one you can change without losing the artwork. Never let an existing frame dictate a format that contradicts the wall.
The second mistake is mixing orientations randomly in a gallery wall. A group with both portrait and landscape pieces works great, but only if the outer edges create a clear shape—a rectangle or a line the eye can follow. Without that frame, the wall looks messy rather than free-spirited.
The third mistake is choosing a landscape format for a wall that’s already divided horizontally. If you have a dado rail, a molding halfway up the wall, or a long, low bookcase underneath, adding another horizontal line doesn’t add anything. In that case, portrait format creates contrast.
The fourth mistake is forgetting the viewing distance. A landscape 70x50 viewed from one meter away in a narrow hallway fills your entire field of vision and is hard to take in. The rule of thumb is that the distance should be about 1.5 times the image’s longest side—105 centimeters for a 70x50, and just over 1.5 meters for a 100x70.
Frame, mat, and the practical catch with landscape formats
Most frames are made symmetrically and work in both orientations, but the hanging hardware doesn’t always. Check that the frame has hooks on both the short and long sides, or that the back has a wire instead of a fixed hook. A frame with a simple fitting mounted for portrait use will hang crooked as soon as you turn it.
The mat also affects your decision. A wide mat emphasizes the image’s existing orientation because it adds the same proportions all around. If you want to tone down a very wide landscape image, you can instead choose a mat with slightly wider margins at the top and bottom, bringing the format closer to a square.
Finally, there’s delivery. Larger landscape formats are rolled just like portrait ones, but the roll’s length follows the image’s longer side—so a 100x70 will come in a longer tube than a 70x100. Lay the print flat under a book for a day before mounting it to get rid of the curl.
Frequently asked questions about landscape and portrait posters
If you’d like to explore individual sizes in more detail, there’s a separate guide to Sweden’s most popular size, 30x40, and if you’re considering going in the other direction, there’s a guide to large sizes on the XXL scale. If you’re grouping several pieces together, the complete gallery wall guide is the next step. The background to the paper standard is explained at ISO 216 for anyone who wants to see the whole system.
Measure the wall, measure the furniture, and let the numbers point you in the right direction. Once you’ve decided on the orientation, choosing the image suddenly becomes both more fun and much easier - and the risk of the poster ending up in the closet after a month drops considerably.