Bathroom mirrors: the complete buying guide

A bathroom mirror is six decisions, not one.

Most buyers make four of them. They pick a size, a shape, a finish, and whether or not they want LED. Then they install the mirror and discover the two decisions they skipped (mirror or mirror cabinet, what features the LED actually does) are the ones that would have changed everything.

Mirror or mirror cabinet?

The first decision is also the most overlooked. A mirror is reflection only; a mirror cabinet adds concealed storage behind the mirrored door (typically 100–150mm deep). Both work above the vanity; the choice depends on storage need rather than aesthetic preference.

Reasons to choose a mirror cabinet

• Storage is tight elsewhere. If the bathroom doesn't have a separate tall unit or wall cabinet, the mirror cabinet adds usable capacity in exactly the right place (daily toiletries, dental supplies, medication).
• You want a single multi-function fitting. Modern illuminated mirror cabinets combine reflection, LED light, demister, and storage in one unit, which simplifies the bathroom design.
• The wall has the depth. Surface-mounted cabinets project 100–150mm from the wall; recessed cabinets sit flush. Make sure neither projection nor recess depth conflicts with the bathroom layout (door swings, ceiling fittings).

Reasons to choose a plain mirror:

• Storage exists elsewhere. A tall bathroom unit or wall cabinet on a separate wall covers the storage need without the cabinet projection at the mirror.
• The aesthetic matters more than the function. Plain mirrors offer wider style range (frameless, bevelled, statement-frame) than cabinets do, because the cabinet body constrains the design.

Browse bathroom mirror cabinets for the cabinet route, or read the mirror cabinets & storage guide for the storage-planning approach.

Illuminated or not?

Three lighting options, in roughly the order of how much daily-use difference they make:

• Plain mirror with overhead lighting. The default. Works if the bathroom has good overhead lighting positioned to illuminate the face at the mirror (not above the head, which casts shadows). Cheapest and simplest.
• Front-lit LED. LEDs around the mirror perimeter project even shadow-free light onto the face. Transforms the grooming experience in bathrooms where the overhead lighting is poor or the user does makeup/shaving at the mirror.
• Backlit LED. LEDs behind the mirror project a soft glow onto the wall. Atmospheric and modern; less practical for close-work grooming than front-lit.

Demister (which heats the mirror to prevent fogging after a shower) is a separate decision that pairs with any of the above. Most modern LED mirrors include demister as standard or as a small upgrade; standalone demister mirrors exist but are less common. For busy or poorly ventilated bathrooms, demister is meaningfully useful; for well-ventilated single-user bathrooms, it's optional.

For the full feature breakdown, read illuminated, LED & demister mirrors explained, or browse LED & illuminated bathroom mirrors for the lit options.

Shape and size

Shape is the most visible mirror decision; size is the most often wrong. The shape options:

• Round. Softens the rectilinear bathroom geometry. Suits both modern and traditional schemes. Currently the most popular shape in UK bathroom design.
• Oval and pill. Between round and rectangular. Pill mirrors (elongated ovals) suit narrower vanities.
• Rectangular. Maximises reflective area. The traditional bathroom mirror shape; reads as substantial and grounded.
• Arched. A rectangular mirror with an arched top. Adds character; reads as deliberate and architectural.

For size, the rule is straightforward: the mirror width should sit at 70–80% of the vanity width below (60–70% for round mirrors, where the smaller proportion suits the shape better).

Vanity width	Rectangular mirror width	Round mirror diameter
500mm (cloakroom)	350–400mm	300–350mm
600mm (standard)	420–480mm	400–450mm
800mm (larger)	560–640mm	500–600mm
1000mm (master)	700–800mm	600–800mm
1200mm+ (double)	900–1000mm	Not recommended at this scale

For the full sizing logic and mounting height guidance, read the bathroom mirror sizes & shapes guide.

Finish and frame

Finish is where the mirror joins the rest of the bathroom. The main options:

• Frameless and bevelled. The mirror is the design. Suits contemporary bathrooms where you want the mirror to recede visually.
• Black framed (matte). The current modern default. Pairs with black brassware and reads as deliberate and contemporary. The highest-converting finish across the category.
• Brass framed (brushed or polished). Pairs with brass taps. Suits Victorian and warm-modern schemes.
• Chrome framed. The mainstream metal option. Pairs with chrome taps (the UK default).

The coordination rule: match the visible metalwork as one family. A black-framed mirror wants matte black taps and matte black vanity handles. Mismatched metalwork is the single most visible bathroom design error.

Browse black framed bathroom mirrors, or frameless & bevelled mirrors for the alternative options.

Smart and grooming features

Beyond the base illumination and demister, four feature categories are available across the modern Plumbworld mirror range:

• Colour-temperature switch. Adjusts the LED from warm (around 3000K) to cool (around 5000K). Useful for households where multiple users want different light feels at the mirror.
• Magnification. A small magnifying inset (typically 5x or 7x) within the main mirror, useful for detailed grooming (eyebrows, contact lenses, close shaving). More common on dedicated magnifying mirrors than standard ones.
• Shaver socket. Integrated 2-pin socket for electric razors or toothbrushes. Less common than it used to be (most households charge devices elsewhere).
• Smart features (Bluetooth speakers, voice control, time/temperature display). Available on premium ranges. Useful if you'll genuinely use them daily; many buyers find these novelty extras get unused after the first month.

Safety and fitting

Electric mirrors and lit mirror cabinets must carry the right IP rating for the bathroom zone they're installed in. The UK bathroom zones are:

• Zone 0: inside the bath or shower. Requires IP67 (full water immersion protection). Almost no mirrors fit here.
• Zone 1: directly above the bath or shower, up to 2.25m. Requires IP44 minimum.
• Zone 2: within 600mm of a water source (where most mirrors sit). Requires IP44 minimum.
• Outside zones: beyond 600mm from water. No IP requirement, though IP44 is still recommended for bathroom use.

Hard-wired electric mirrors should be installed by a qualified electrician with Part P compliance. Plug-in mirrors (connecting to a switched fused spur) can be DIY-installed by confident installers. The product spec on every Plumbworld lit mirror lists its IP rating; check this matches your install zone before ordering.

How to choose, step by step

The six decisions in order:

1. Decide: mirror or mirror cabinet? Based on whether you need storage in the mirror area or have it elsewhere.
2. Decide: illuminated or not? Front-lit LED for grooming-heavy bathrooms; plain mirror if overhead lighting is good.
3. Pick the shape. Round for modern softening; rectangular for traditional and larger bathrooms; oval/pill for narrower vanities; arched for character.
4. Size the mirror to the vanity. 70–80% of vanity width for rectangular; 60–70% for round. Use the size table above.
5. Pick the finish to match the metalwork family. Black for matte black bathrooms; brass for brass bathrooms; chrome for chrome bathrooms; frameless when the mirror should recede.
6. Add any specialist features (demister, colour switch, magnification, smart). Then check the IP rating matches your install zone.

Worked examples by bathroom type

To make the six-decision method concrete, here are the choices applied to four common UK bathroom situations:

• Modern family bathroom (5m², 800mm vanity, matte black taps). Mirror cabinet for the daily-toiletries storage need. Front-lit LED with demister for grooming and steam clarity. Rectangular 600mm shape for proportion against the vanity. Matte black frame matching the taps. Colour-temperature switch worth including for shared use.
• Period Victorian renovation (4m², 600mm vanity, brass taps, traditional scheme). Plain mirror (storage available in separate tall unit). No LED (the period scheme suits ambient lighting). Round shape in 450mm for soft contrast against the rectangular vanity. Brushed brass frame matching the taps. No specialist features needed.
• Compact downstairs cloakroom (1.5m², 450mm vanity, chrome taps). Plain mirror (no storage need in a cloakroom). No LED (overhead lighting sufficient for a cloakroom; LED would over-spec the room). Round 350mm shape to handle the tight space gracefully. Slim chrome frame matching the taps. Demister optional, depends on shower upstairs venting into the cloakroom.
• Master ensuite (3m², 1000mm double-basin vanity, mixed metalwork). Mirror cabinet for ensuite storage need. Front-lit LED with demister, colour-switch, and shaver socket (heavy daily-grooming use). Two 400mm rectangular cabinets above each basin position (rather than one wide cabinet) for symmetry. Black frame for modern coordination. Smart features only if there's genuine intent to use them.

Common buying mistakes to avoid

Five errors that come up repeatedly in UK bathroom mirror buying regrets:

• Sizing to the wall, not the vanity. A wide wall doesn't justify a wide mirror; the mirror should size to the vanity beneath it regardless of how much wall space is available. Going wider than 80% of the vanity width reads as oversized; going wider than the vanity itself looks definitively wrong.
• Picking finish before knowing the taps. The mirror frame finish has to coordinate with the bathroom metalwork family. Buying a brass-framed mirror for a chrome-tapped bathroom is a guaranteed regret. Confirm the tap finish first; pick the mirror finish second.
• Underspending on the silvering. Budget mirrors at very low prices use lower-grade silvering that develops black edge spots within 5–10 years of bathroom moisture exposure. The difference between £40 and £100 for the same-size mirror is mostly silvering quality; for a 20-year purchase, the upgrade pays back.
• Treating IP rating as optional. UK bathroom electrical regulations are specific; installing a non-IP-rated electric mirror in a wet zone is illegal and dangerous. Always verify the mirror's IP rating matches the install zone before ordering, not after.
• Over-speccing smart features. Bluetooth speakers, voice control, time/temperature displays add £100–£300 to the mirror price and rarely get used after the first month. If you don't have a clear daily-use case for the feature, skip it. The base LED and demister are the upgrades worth paying for.

Buying guide FAQs

How do I choose a bathroom mirror?

Work through six decisions in order: storage (mirror or cabinet), light (LED/backlit/none), shape, size (sized to the vanity), finish (matching the bathroom metalwork family), and any specialist features (demister, magnification, smart). Then check IP safety. Most regrets come from skipping the storage or feature decisions and discovering them after install; the six-step method is to make all six decisions consciously.

Do I need an illuminated mirror?

If significant grooming happens at the mirror (makeup, shaving, contact lenses, detailed skincare), yes; the daily-use difference from shadow-free LED light is substantial. If the bathroom is mainly used for showering and basic washing, with good overhead lighting already in place, a plain mirror is fine. The LED premium is £80–£200 over a comparable plain mirror; worth it for the right use case.

What size mirror over a vanity?

Rectangular mirrors at 70–80% of the vanity width; round mirrors at 60–70%. A 600mm vanity wants a 420–480mm rectangular mirror or a 400–450mm round mirror. A 1000mm vanity wants 700–800mm rectangular or 600–800mm round. Going wider than the vanity reads as oversized; going narrower than 60% reads as undersized.

Should I install the mirror myself or hire someone?

Plain mirrors are straightforward DIY for anyone confident with wall fixings; the mounting brackets are simple and the mirror weight is manageable. Hard-wired electric mirrors should always be installed by a qualified electrician for Part P compliance and IP safety. Plug-in LED mirrors connecting to a switched fused spur can be DIY if you're confident, but the wiring to the spur itself should still be done by an electrician.

How long do bathroom mirrors last?

Quality bathroom-grade mirrors last 20+ years before showing edge spotting or silvering damage. Budget mirrors (especially those at very low prices) can develop black edge spots from moisture infiltration within 5–10 years. LED arrays in modern mirrors are rated for 20,000–50,000 hours (18–45 years at typical UK bathroom use), so the LED rarely fails before the mirror does. Buying from manufacturers with proper UK warranty coverage usually gets you the longer-lasting version.

Ready to shop? Start at the bathroom mirrors hub, or jump to the PLP for your priority decision: LED & illuminated, mirror cabinets, round, or black framed.

Plumbworld has supplied UK bathroom mirrors since 1999, with a 4.8/5 rating from over 60,000 Trustpilot reviews, free UK delivery, a price match promise, and 365-day returns. Making all six decisions consciously is the low-risk route to a mirror you won't regret.

Big brands, small prices.