The most common mistake with wall art is not the subject. It is the size, and nearly always in the same direction: too small.
A piece that is too small on a large wall does not look understated, it looks forgotten. That is avoidable with three measurements and a tape.
The rule: two thirds
If the piece hangs above a piece of furniture, its total width should be around two thirds of the width of the furniture. Three quarters is sometimes quoted, but two thirds is a safe starting point.
An ordinary three-seat sofa is around 200 centimetres wide. Two thirds of that is roughly 130 centimetres. That is not one piece, it is a group - and it is precisely why so many sofa walls look empty.
Above a 90 centimetre chest of drawers the same calculation gives about 60 centimetres, which is a single piece.
The gap above
The lower edge should sit 15 to 20 centimetres above the back of the sofa or the top of the chest. Any less and it looks cramped; any more and the piece stops belonging to the furniture and starts to float.
On a free wall with no furniture the centre rule applies instead: the middle of the piece around 145 centimetres above the floor. That is average standing eye level and the measurement galleries and museums work from. In a room where people mostly sit, such as a dining room, it works to go a few centimetres lower.
Our sizes, concretely
The square mountain pieces have a topography of 25 by 25 centimetres and a frame measuring 28 by 28 centimetres externally. That is a piece which works alone above a narrow chest, in a hallway or on a pier of wall, but which needs company above a sofa.
The Sweden piece is 90 by 40 centimetres and is therefore the only one in the range that carries a sofa wall on its own. Italy is 60 by 50 centimetres. If you want a larger square format, 50 by 50 is available as an option in FRMD by You.
Several small instead of one large
Three square pieces in a row with 5 to 8 centimetres between them comes to around 95 centimetres in total. With 10 centimetres between them, around 104. That covers most two-seat sofas and starts to approach the measurement for a three-seater.
A grouping works best if it is kept consistent: same frame colour, same format, same spacing. Then the three read as one object. Mix sizes and colours and you get three things competing instead.
A common arrangement is three places with a shared story. The mountain you grew up beside, the one you ski now, and the one you are going to.
Before you drill
Tape a piece of paper of the right size to the wall and leave it for a day. It is dull advice and it is the only thing that actually works. You can tell in ten seconds whether the proportion is right, and you can tell better the next morning.
Once the size is settled, height, spacing and light remain. We cover those in the guide to hanging. If you are choosing between oak and black, there is a separate article on that.