What Size Mirror Above a Sideboard? Full Guide | Reflessa

The short answer

A mirror above a sideboard should be about two-thirds to three-quarters as wide as the sideboard, with its lower edge hung 15 to 25 cm above the top of the furniture. For a 160 cm sideboard, that means a mirror roughly 105 to 120 cm wide, or a round mirror of the same diameter.

That single proportion solves most of the problem. The rest of this guide explains how to adapt it to your ceiling height, the shape of mirror you prefer, and the objects you want to display underneath.

Mirror width by sideboard width

Measure the sideboard, then multiply that width by 0.66 and by 0.75. Any size between those two numbers will look deliberate rather than accidental.

Two principles sit behind those numbers. First, the mirror should never be wider than the sideboard: a mirror that overhangs the furniture makes the piece below look undersized. Second, leave visible wall on both sides, ideally at least 10 cm, so the mirror reads as a framed object rather than as wall covering.

When to size up

Go towards the upper end of the range, or slightly beyond it, when the ceiling is above 2.7 m, when the wall is otherwise empty, or when the sideboard is low and visually light. A larger mirror also works harder in a dark room, because the reflecting surface is what actually redistributes daylight.

When to size down

Stay at the lower end when the sideboard already carries tall objects such as table lamps or large vases, when the wall is interrupted by a light switch or a radiator, or when the room is narrow. In a corridor or a compact dining area, a smaller mirror hung with generous space around it looks considerably more expensive than a large one squeezed into place.

How high above the sideboard should it hang?

The gap between the top of the sideboard and the bottom edge of the mirror should be 15 to 25 cm. Below 15 cm the two elements crowd each other; beyond about 30 cm they stop reading as one composition and the mirror starts to float.

A worked example: a sideboard 80 cm high, plus a 20 cm gap, puts the bottom edge of the mirror at 100 cm from the floor. A 100 cm round mirror then finishes at 200 cm, which sits comfortably under a standard 2.5 m ceiling. Aim to keep at least 25 to 30 cm of wall between the top of the mirror and the ceiling.

Note that this differs from the usual advice to centre a mirror at eye level, around 150 to 160 cm. Above a sideboard, the relationship to the furniture matters more than an abstract eye-level rule. Hang the mirror to the sideboard, not to the room.

Before drilling, mark the outline of the mirror on the wall with painter's tape, then step back and look at it from where you actually sit or enter. Proportions that work on paper sometimes need five centimetres of adjustment in the room itself.

Round, rectangular or baroque?

Round

A round mirror is the safest choice above a sideboard, because a sideboard is a long horizontal box and a circle softens that line instead of repeating it. Diameter is the only measurement you need, which makes the two-thirds rule easy to apply. Diameters of 100 to 120 cm suit most sideboards between 140 and 180 cm.

Rectangular and baroque

A portrait-format mirror adds height and suits rooms with tall ceilings or a formal character. Because it is narrower than a round mirror of the same visual weight, it also works where the wall is interrupted on one side. An ornate carved frame turns the sideboard into a console-like arrangement; keep the objects below it restrained so the frame stays the focal point.

Frameless and organic

A frameless mirror with an irregular outline behaves like a piece of wall sculpture. It is the right answer when the interior is deliberately asymmetric, and the wrong one when the room relies on symmetry, because an organic shape resists being centred.

Four mistakes worth avoiding

• A mirror wider than the sideboard. It reverses the visual hierarchy and makes the furniture look like an afterthought.
• Ignoring what the mirror reflects. A mirror doubles whatever faces it. Opposite a window it multiplies daylight; opposite an open wardrobe or a cluttered desk it multiplies the clutter.
• Decor that covers the glass. Keep objects on the sideboard below roughly one-third of the mirror's height, so the reflection is not blocked by the tallest vase.
• Hanging by eye level alone. The 150 cm rule is meant for empty walls. Above furniture, the gap to the sideboard is what the eye actually reads.

Three mirrors that work above a sideboard

Solaro — round, brushed gold. Available in eight diameters from 60 to 200 cm, from 400 EUR. The 100 cm and 120 cm sizes cover most sideboards between 140 and 180 cm, and the warm brushed finish sits well with oak, brass and cream tones.

Noir — round, matte black. The same eight diameters from 60 to 200 cm, from 400 EUR, with a slim 28 mm frame profile. A graphic choice for rooms with stone, walnut or monochrome surfaces.

Onyx Scroll — baroque, black and silver. Fifteen sizes from 50 × 100 cm up to 100 × 180 cm, from 408 EUR. The 50 × 100 cm and 60 × 120 cm formats are the portrait option for a sideboard under a high ceiling.

If none of the standard sizes fit

Every Reflessa mirror is made to order in Europe with Optiwhite glass, so the size can follow the furniture rather than the other way round. Production takes 15 to 20 business days, and delivery costs are calculated at checkout from the weight and dimensions of the finished piece. Standard sizes can be returned within 14 days, while mirrors made to individual measurements are excluded from returns. Every mirror carries a two-year warranty for private customers and one year for business customers.

Frequently asked questions

What size mirror goes above a 180 cm sideboard?

Between 119 and 135 cm wide. A 120 cm round mirror is the most common practical choice and leaves roughly 30 cm of visible wall on each side.

How far above a sideboard should a mirror hang?

Between 15 and 25 cm from the top of the sideboard to the bottom edge of the mirror. Use the larger gap if tall objects stand on the furniture.

Can a mirror be wider than the sideboard?

As a rule, no. A mirror wider than the furniture below makes the sideboard look undersized. The only common exception is a very narrow console against a large empty wall.

Is a round or a rectangular mirror better above a sideboard?

A round mirror softens the horizontal line of the sideboard and suits modern interiors. A portrait rectangular or baroque mirror adds height and suits tall ceilings and more formal rooms.

Should the mirror be centred on the sideboard or on the wall?

Centre it on the sideboard. If the sideboard is not centred on its wall, aligning the mirror to the wall instead makes the offset more obvious, not less.