Choose a bathroom mirror cabinet with lights by measuring width, height and depth together. The front should sit comfortably above the vanity, the depth should leave a natural standing position at the basin, and the doors need room to open. The best size is the one that holds your daily essentials without making the washing area awkward.
Start with the bathroom mirror cabinet range and compare the measured examples below. Two offer mirror-face lighting and a demister; the woodgrain option has internal lighting for storage.
Measure the space in a useful order
- Measure the vanity width and the clear wall between side cupboards, screens and window reveals.
- Measure above the tap and below the nearest obstruction to establish the usable height.
- Check cabinet projection from the wall where you stand at the basin.
- Allow for each door to open without hitting the side wall, tap, light or shower screen.
- Measure the tallest and deepest everyday items you want to store.
A flat mirror and a cabinet are different planning tasks. The cabinet adds weight, shelves and moving doors as well as depth. A paper outline checks the front view; a cardboard box of similar depth helps you judge how it will feel above the basin.
A narrower illuminated cabinet: 50 × 70 × 13 cm
50 × 70 × 13 cm LED mirror cabinet with Bluetooth — £269 combines front-facing lighting, a demister and a clock display with concealed storage. Its overall dimensions give you a clear starting point for a narrower wall or a standard single basin.
Above a 60 cm vanity, a centred 50 cm cabinet leaves a visual margin of 5 cm on each side. That does not automatically establish door clearance: check nearby walls and fittings as well as the front alignment.
A wider two-door illuminated cabinet: 80 × 70 cm
80 × 70 cm LED mirror cabinet with dual Bluetooth speakers — £369 suits a wider vanity and a household with more daily items to organise. It provides mirror-face lighting and a demister as well as shelving behind the doors.
Its detailed drawing shows a 12 cm cabinet-body depth and a separate 2.3 cm door thickness. The main internal area is labelled 71 cm wide × 62 cm high, with 10 cm-deep shelves. Those storage dimensions are more useful for bottles than the outside width alone. Do not read the body depth as a single complete projection figure without allowing for the door and installation.
The two door widths are different in the drawing, so check the opening path on both sides rather than assuming two identical doors. The cabinet does not include a shaver socket; Bluetooth speakers and LED lighting do not imply a charging socket.
A storage-first alternative: 50 × 66 × 14 cm
50 × 66 × 14 cm walnut-effect mirror cabinet — £169 brings a warmer woodgrain finish. Its sensor-equipped internal light helps you see stored items; it is not mirror-face illumination and does not provide a demister. Pair it with suitable room lighting when storage and finish are the priorities.
For this 50 × 66 cm size, the drawing shows a 12 cm body plus a 2 cm door, with an internal area 45 cm wide × 63 cm high and 10.7 cm shelf depth. The internal light uses AAA batteries, which are not included. These dimensions belong to this specific size rather than every variant.
Choose shelf space for what you use daily
Group toothbrushes, skincare and grooming products before deciding how much storage you need. Measure a tall bottle with its pump fitted, and allow enough room to take it out without knocking neighbouring items over. Outside depth includes the construction and door; usable shelf depth is smaller.
Keep bulk refills elsewhere if they make the cabinet crowded. A wider cabinet can help a shared bathroom, but sensible shelf spacing may matter more than simply adding width. Read mirror cabinets for cluttered family bathrooms for storage-led planning.
Make installation part of the sizing decision
The wall needs fixings appropriate to the cabinet and construction. Plan the electrical connection for illuminated models with a qualified electrician before drilling. Choose the mounting height for the main users and tap clearance, then test the open-door path. A neat fit on the wall should still feel comfortable while washing your face.
Should the cabinet be exactly as wide as the vanity?
It can match, but a slightly narrower front often looks balanced. Use the available wall, basin position and door movement to choose rather than applying one width rule to every room.
What if I want illumination but do not need storage?
A flat illuminated mirror may be a better fit. Compare bathroom mirrors with lights and LED mirror sizes and features before adding cabinet depth you do not need.
Which of these cabinets lights the mirror face?
The 50 × 70 × 13 cm Bluetooth cabinet and the 80 × 70 cm dual-speaker cabinet provide mirror-face lighting and a demister. The 50 × 66 cm walnut-effect cabinet provides internal storage lighting only.
Prices and the linked in-stock options were checked on 27 October 2026. Any checkout promotion is applied separately.
Enjoy free UK delivery, a 3-year warranty and free replacement if your mirror arrives damaged.
Continue planning your mirror
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