For a cloakroom vanity, start with the basin width and the usable wall above it. A mirror slightly narrower than the vanity often leaves a comfortable border, while a similar-width mirror gives a more fitted look. In a tiny downstairs toilet, the best choice is the one that fits the wall and gives a useful reflection without crowding nearby fittings.
A compact rectangle for a small basin
The 40 × 50 cm frontlit mirror is a practical starting point for a narrow basin wall. Its 40 cm width leaves 5 cm on each side when centred over a 50 cm vanity. Three light colours, memory and anti-fog add everyday convenience.
A curved option for a softer outline
The 50 × 70 cm oval dual-light mirror combines front and back lighting with dimming and anti-fog. It uses more height while keeping the central width to 50 cm, so it is worth comparing on a taller cloakroom wall.
An oval narrows towards the top and bottom. Mark the whole outline rather than comparing only the centre width, and check your face sits comfortably in the reflection.
A round mirror where there is side clearance
The 60 cm round front-and-back-lit mirror brings a circular focal point and adjustable light. A 60 cm diameter needs 60 cm of usable width and height, plus space around fittings. It works well when the vanity wall can carry that circle comfortably.
Measure the details that change the fit
- Vanity width and the clear wall between obstacles.
- Tap height, splashback and the mirror’s proposed bottom edge.
- Door swing, towel rings, shelves and shower glass if present.
- Reflection height and access to the touch controls.
The mirror size calculator can help you compare proportions, but the taped outline is the final visual check. A mirror that looks attractive in a large product photograph may feel very different above a tiny basin.
Choose lighting for the way the cloakroom is used
Front lighting is useful for quick grooming. A rear glow creates atmosphere and works well alongside other room light. If there is no bath or shower, anti-fog may be less important than size and useful illumination. For a powered mirror, plan the supply and installation position with an electrician before fitting.
A clear starting point for a small room
Compare one rectangle and one curved shape against your measurements, then choose the outline you enjoy from both the basin and doorway. Browse LED Mirror World for your finishing touch, with related small-room guides below.
Related mirrors and planning guides
- small bathroom mirrors for UK cloakrooms
- LED Mirror World
- round mirrors for bathroom vanities
- Rectangle Backlit Bathroom Mirror with Touch Controls
- Round Backlit Bathroom Mirror with Anti-Fog
- compare bathroom mirrors with lights
- how an 800mm vanity changes mirror sizing
- the best LED mirror shapes for narrow UK bathrooms
- whether an LED mirror cabinet is better than a flat mirror
- Arched LED Bathroom Mirrors in Contemporary Design
- LED Mirrors for Double Vanities: What to Look For
- LED Mirrors for Guest Bathrooms: How to Choose the Right One
- What Size Mirror for Small Bathroom
- Rectangle LED Mirrors for Functional Bathrooms
- How LED Mirrors Affect Perceived Bathroom Size (And How to Use That to Your Advantage)
- What Is the Best LED Mirror for a 500mm Cloakroom Basin?