For a 30-inch vanity, start by comparing mirrors around 60–70 cm wide. The vanity is approximately 76.2 cm wide, so those sizes leave a visible margin on either side. A narrower 50 cm oval can also work well when you want a softer accent or extra space around wall lights.
There is no single compulsory width. Use the full vanity width, available wall space and the reflection you need—not just the basin bowl—to find a balanced fit.
See the proportions in centimetres
On a small screen, swipe the table to compare all columns.
| Mirror width | Space each side when centred on a 76.2 cm vanity | Visual effect |
|---|---|---|
| 50 cm | 13.1 cm | A lighter, narrower feature. |
| 60 cm | 8.1 cm | A comfortable starting point for many single basins. |
| 70 cm | 3.1 cm | A fuller-width look with less room beside it. |
These margins describe horizontal alignment only. Wall lights, cabinets and a wall return may reduce the usable space. Our mirror size calculator is useful for comparing the outline before you buy.
Three shapes to try above your vanity
60 cm round dual-light mirror — £128. The circular shape softens a rectangular cabinet, while front and rear lighting combine practical illumination with a wall glow. Its overall height is also 60 cm.
60 × 80 cm dual-light mirror — £129. At 60 cm wide and 80 cm high in portrait orientation, this creates a taller reflection without using the full vanity width. Check the upper clearance and mounting layout.
50 × 70 cm oval dual-light mirror — £148. A slimmer silhouette for a small bathroom, especially when you want breathing room around the mirror. Dimming and light-colour options help adapt the reflection to your routine.
Prices and stock checked on 27 October 2026. Listed prices are before any checkout promotion.
Choose height around the people using it
There is no minimum 30-inch mirror height for every 30-inch vanity. Mark the proposed outline above the taps and check the reflection for the people who will use it. Allow room below ceiling features, wall lights and cupboards. A taller rectangle may suit a range of users; a round or oval shape may give the wall a more relaxed finish.
Browse round LED mirrors and rectangular LED mirrors by their actual dimensions. The oval backlit range offers another lighting effect if your room already has useful task lighting.
Do not let the photograph decide the fit
A product may be photographed above a much wider cabinet. A rope-framed round design also needs space for its full mounting arrangement, not just the glass. The extra-large dual-light range is a separate option for substantially wider layouts, rather than a default match for this vanity.
Finish with the right light
Front lighting is useful for the viewing area; backlighting adds atmosphere to the wall. A dual-light design brings both effects together. Keep the room’s other lighting in the plan, particularly if you apply makeup or shave at this basin. A good width is only part of a comfortable daily reflection.