For a mirror above a buffet or sideboard, start with a width around two-thirds to three-quarters of the furniture. A 150 cm sideboard, for example, pairs neatly with a mirror about 100–112 cm wide. Then adjust the shape and height around your lamps, ceiling and the view you want to reflect.
The aim is a balanced arrangement that makes the furniture look considered. A generous landscape mirror can anchor a dining room; a smaller sculptural shape can work beautifully beside a tall lamp. Use the measurements below to choose with confidence.
A quick size guide for your sideboard
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| Buffet or sideboard width | Starting mirror width | How to use the space |
|---|---|---|
| 120 cm | 80–90 cm | Leave breathing room for a small vase or lamp. |
| 150 cm | 100–112 cm | A 100 cm landscape mirror gives a calm, centred arrangement. |
| 180 cm | 120–135 cm | A 120 cm design leaves room at both ends for taller accessories. |
| 200 cm | 133–150 cm | A 140 cm mirror creates a broad focal point without reaching the furniture edges. |
| 240 cm | 160–180 cm | Use a large landscape mirror or a deliberately grouped arrangement. |
These are styling starting points, not installation rules. Measure the furniture itself rather than the whole wall. If the buffet sits inside an alcove, also measure the usable wall width and allow space for nearby shelves, curtains or switches. A paper outline lets you test the proportions before ordering.
Choose the shape that gives the room balance
A landscape rectangle repeats the long line of a buffet and reflects more of the room across its width. It is a strong choice above a dining-room sideboard, especially when you want a symmetrical arrangement. Explore our rectangular mirrors for straight lines and illuminated finishes.
A round, oval or irregular mirror breaks up a room full of rectangular furniture. If you choose a narrower decorative shape, balance it with a lamp, flowers or artwork rather than trying to stretch the mirror across the whole buffet. Keep the objects below the main reflection so the arrangement still feels open.
Three illuminated options for different furniture widths
The product photographs show bathroom settings, but these wall-mounted designs can also become illuminated features in a dining or living space. Plan a tidy power connection as part of the arrangement. The following stocked sizes give you three useful starting points:
On a small screen, swipe the table to compare all columns.
| Mirror and listed price | Suggested furniture starting point | What it brings to the room |
|---|---|---|
| 100 × 60 cm double-light rectangle — £198 | Around 150 cm wide | Front and back lighting, dimming and three light colours for a brighter feature or softer evening glow. |
| 120 × 60 cm gold frontlit rectangle — £259 | Around 180 cm wide | A defined gold frame and adjustable front lighting to complement brass accents or warm timber. |
| 140 × 70 cm extra-large dual-light mirror — £299 | Around 200 cm wide | A broad reflection with front and back lighting for a substantial furniture arrangement. |
Prices and stock checked on 27 October 2026. Prices shown are the listed prices before any checkout promotion; select the linked size and power option for that price.
Find a hanging height that works from your seat
There is no need to force every mirror to the same distance above the furniture. Start with a visible gap, then look at the outline from the dining table and the doorway. The mirror should feel connected to the buffet without a lamp or vase hiding most of the reflection.
Check what appears in the glass before choosing the final height. A window, pendant or favourite painting can make the room feel more inviting. A cluttered worktop or busy doorway may call for a small position change. Our guide to where to put a mirror in the living room offers more placement ideas; using mirrors to make a room feel bigger explores reflections and sightlines.
Style the buffet without crowding it
- For symmetry, centre the mirror and use lamps or objects of similar visual weight at each end.
- For a relaxed arrangement, group a tall lamp with a smaller vase on one side and leave more clear surface on the other.
- Repeat one finish, such as gold, black or timber, through the frame and accessories.
- With an illuminated mirror, try a softer evening setting alongside your dining lights rather than making every light equally bright.
Mark the mirror outline and the furniture position together, then plan the fixing points and cable route. Suitable wall fixings and a concealed power connection make the finished display feel intentional. Arrange any fixed wiring through a qualified electrician.
Sideboard mirror questions
Can the mirror be wider than the buffet?
It can work as a deliberate wall feature, but it is harder to balance. For a straightforward furniture-led arrangement, choose a mirror narrower than the sideboard and leave visible space at both ends.
Should I choose a large mirror or a smaller decorative one?
Choose a large landscape mirror when you want the sideboard to anchor the room. Choose a smaller decorative shape when lamps or artwork share the display. Try both outlines at full size to see which looks right from the places you sit.
Ready to create your focal point? Browse large illuminated mirrors for broader walls, or compare the wider mirror collection. If you are sizing a bathroom too, our 1000 mm vanity mirror guide covers basin-specific proportions. Free UK delivery and a 3-year warranty help make your next room upgrade straightforward.