Not sure what size mirror to buy? Our expert guide covers how to choose the right mirror size for every room in your home - with top picks from the Mood Living range
Start With the Wall, Not the Mirror
Before you fall in love with a particular style, measure your wall. A reliable rule of thumb is that your mirror should take up roughly two-thirds to three-quarters of the available wall width. This creates natural visual balance without dominating the room.
If you're hanging a mirror above furniture - a vanity unit, a console table, or a fireplace mantle - aim for the mirror to be slightly narrower than what's beneath it. A mirror that's wider than the furniture below can look top-heavy and unanchored.
Bathroom Mirrors: Precision Matters
Bathrooms are where mirror sizing has the biggest impact on everyday life. The right size isn't just about aesthetics - it's about functionality too.
For a single vanity, a mirror that roughly matches the width of your sink unit tends to look the most polished and intentional. For smaller en-suites or compact bathrooms, a smaller vertical mirror is ideal - it draws the eye upward and avoids crowding the wall. For larger family bathrooms, you have more room to go bold.
Our pick for smaller bathrooms: The Lillie Arch Bathroom Wall Mirror (available in 50Hx40Wcm and 60Hx45Wcm) is a best-seller for good reason. Its elegant arch silhouette adds character without overwhelming compact spaces, and the two size options make it easy to find the right fit.
For those wanting something with a little more visual weight: The Diana Modern Oval Bathroom Wall Mirror comes in two sizes (50Hx40Wcm and 70Hx50Wcm) and features 5mm silver-backed glass with a 20mm bevel - a refined choice that works beautifully in both modern and traditional bathrooms.
For larger bathrooms where practicality is a priority: Consider the Iowa Rectangular Bathroom Mirror with Shelf, available in three sizes (50Hx40Wcm, 60Hx43Wcm, and 70Hx50Wcm). Integrating storage with your mirror is a smart move in bathrooms where space is at a premium.
Illuminated Bathroom Mirrors: Size Plus Function
If you're considering an illuminated mirror - and it's worth it - the sizing rules stay the same, but there's an additional dimension to think about: the light output relative to the room. A larger illuminated mirror in a small bathroom can create a gloriously bright, spa-like feel. In a bigger bathroom, going larger with your illuminated mirror ensures the lighting is proportional to the space.
The Ara Warm/Cold LED Illuminated Bathroom Wall Mirror (60Hx60Wcm, £249.99) is a standout option. With switchable warm and cold LED settings, a motion sensor switch, and a moisture-resistant design, it delivers both the light and the luxury a bathroom deserves. It's the kind of mirror that genuinely elevates the whole room.
For those who want storage built in too, the Double LED Illuminated Bathroom Mirror Cabinet features a demister pad, motion sensor lighting, and a shaver socket - everything in one sleek unit.
The Shape Factor
Shape affects how a mirror reads in a space just as much as its dimensions. Round and oval mirrors tend to feel softer and less imposing than rectangular mirrors of a similar size - their lack of corners means they can sit comfortably in tighter spots. The Rachel Round Bathroom Wall Mirror (available in 40Hx40Wcm and 60Hx60Wcm) is a great example: clean, contemporary, and versatile enough to work in bathrooms, bedrooms, or hallways.
If you want something with a stronger design statement, the Octagon Modern Bathroom Wall Mirror (available in 50Hx40Wcm and 70Hx50Wcm) adds a geometric edge that works particularly well in modern or industrial-influenced interiors.
Height: Where You Hang It Matters
Getting the size right is only half the battle - placement matters just as much. For wall-mounted bathroom mirrors, the centre of the mirror should sit at approximately eye level, which for most adults is around 145–155cm from the floor.
In rooms with high ceilings, hanging your mirror slightly higher draws the eye upward and makes the most of the architecture. In rooms with lower ceilings, a tall vertical mirror will make the space feel far more generous than a wide horizontal one.
Don't Play It Too Safe
One of the most common mistakes when choosing a mirror size is going too small. It feels like the safer option, but an undersized mirror rarely makes the impact you're hoping for. When in doubt, go up a size - the additional visual presence almost always pays off.
A simple trick before you buy: cut a piece of paper or cardboard to your intended mirror dimensions and tape it to the wall. Live with it for a day or two and see how it sits in different lighting conditions. It takes five minutes and saves a lot of second-guessing.
Find Your Perfect Mood Living Mirror
Every mirror in the Mood Living range is designed with quality craftsmanship and real homes in mind - from compact plain mirrors for snug en-suites to large illuminated statement pieces for family bathrooms. With over 10,000 reviews and free UK delivery on orders over £50, finding the right mirror has never been easier.