A vanity mirror can comfortably be wider than the basin bowl. The more useful comparison is usually the width of the whole vanity unit and the clear wall above it. A small basin set into a broad countertop does not need an equally narrow mirror. Centre the reflection around the user and basin, then choose a width that works with the furniture and nearby lights.
The basin, countertop and vanity are different measurements. Mixing them up can lead to a mirror that feels too small even when it technically matches the sink. Measure all three before deciding how much wall to fill.
Basin width is not vanity width
On a small screen, swipe the table to compare all columns.
| Measurement | Why it matters |
|---|---|
| Basin bowl | Helps locate the centre of the washing area. |
| Full vanity or countertop | Gives the main visual reference for mirror width. |
| Clear wall between fittings | Sets the actual space available for the mirror and its installation. |
For example, an 80 cm mirror above a 100 cm vanity leaves about 10 cm of furniture width on each side when centred. It may be much wider than the bowl and still look balanced. Use our mirror size calculator with the full vanity measurement, then check the result against the wall.
When a wider mirror works well
A wider reflection can make a generous countertop feel connected and gives more room for shared routines. It also reflects more of the room. Choose it when there is clear wall space and the light fittings or adjacent cupboards do not compete with the glass.
A mirror wider than the entire vanity is a different design decision. It can work across a continuous wall, but it is not necessary to get a broad useful view. Mark the outline and check how it relates to neighbouring furniture before ordering.
Three shapes to compare
80 × 60 cm gold frontlit mirror — £159. A clear rectangular outline suits furniture with strong straight lines, while the gold finish adds warmth. Front lighting, adjustable settings and anti-fog support the everyday routine.
60 cm round dual-light mirror — £128. A compact circular focal point for a single basin. Compare its widest point with the vanity, but remember the reflection narrows at the top and bottom. Browse round LED mirrors for other diameters.
100 × 60 cm dual-light mirror — £198. A broader reflection for larger furniture, combining front illumination and wall glow. Browse rectangular LED mirrors if width and straight edges are the priorities.
Prices and stock checked on 27 October 2026. Listed prices are before any checkout promotion.
Leave room for the whole setup
Side lights need space, and a framed mirror’s overall dimensions include the frame. Check taps, shelves, controls and cabinet doors before settling the lower and side edges. Use tape to compare two possible sizes; this is more useful than trying to judge scale from a styled product photograph.
For two basins, align two mirrors with the basin centres or choose one wider reflection spanning both. If you prefer a circular framed accent, compare the gold round backlit design alongside the surrounding finishes.
Choose the width that makes daily use comfortable
A slightly narrower mirror than the vanity often gives a tidy visual margin, but it is a styling starting point rather than a rule. A narrower mirror can leave room for wall lights; a wider one can serve shared furniture. Make sure everyone using the room can see comfortably at their normal position.
Read matching vanity lights to mirror width and mirror width compared with the basin to finish the layout. For specific furniture, use the guides for cloakroom vanities, 800mm vanities and 1000mm vanities.