How to Choose the Right Mirror Size for Your Bathroom

When it comes to bathroom upgrades, people often overlook one of the most functional—and visually striking—elements in the space: the mirror. It’s not just there for brushing your teeth or fixing your hair. The right mirror can brighten your bathroom, make it feel bigger, and even pull the whole design together. But choosing the correct size? That’s where many get stuck.

So, how do you find the perfect mirror size for your bathroom? Well, we’re glad you asked.

What Size Mirror Should I Get For My Bathroom Vanity?

This is the big question, isn’t it? While there’s no one-size-fits-all answer (annoying, we know), there are guidelines to help make the decision easier. A good rule of thumb is to choose a mirror that’s a few inches narrower than your vanity. If your vanity is 800mm wide, a mirror around 700-750mm tends to look balanced without crowding the space.

But rules aren’t laws. In a powder room, for instance, you might go with a mirror the same width as the vanity—or even a bit wider—to create a dramatic, oversized look. It really depends on the effect you’re going for.

How High Should a Bathroom Mirror Be Placed?

Height is just as important as width. Hang your mirror so the centre sits roughly at eye level for most users. Sounds obvious, but you’d be surprised how many mirrors end up awkwardly high or frustratingly low.

If you're working with a tall mirror or one with built-in lighting, you'll want to make sure the top doesn’t overwhelm the space—especially if you have a low ceiling.

That said, there’s wiggle room here too. In bathrooms with high ceilings or unusual layouts, it’s perfectly fine to tweak placement to fit the proportions of the room.

Can a Bathroom Mirror Be Too Big?

Technically? Yes. But "too big" is relative.

A mirror that dominates the entire wall might look overwhelming in a tiny en-suite but feel just right in a spacious master bath. The key is proportion. Mirrors should complement—not compete with—the other elements in the room.

Also worth noting: if your bathroom leans minimalist, an oversized mirror can still work beautifully, especially when paired with modern bathroom mirrors designed with clean lines and smart lighting.

Should I Use One Mirror or Two?

If you’ve got a double vanity, you’re probably weighing the pros and cons of one large mirror versus two separate ones. Here’s the gist:

• One large mirror gives a seamless, continuous feel—great for reflecting more light and creating a spacious vibe.
• Two smaller mirrors can add structure and symmetry, especially in more traditional or design-led bathrooms.

It really comes down to taste and practicality. Do you both use the sink at the same time in the morning? Two mirrors might be worth it.

What Shape Works Best in a Bathroom?

You’ve probably seen those stunning round mirrors on Instagram—very trendy. Round mirrors work especially well in small bathrooms or with curved design features (like oval basins or arched alcoves).

Rectangular mirrors are more traditional, but still wildly popular for good reason. They provide more vertical viewing space and can double as a stylish storage cabinet.

You might even consider an irregular or asymmetrical shape if you're going for a more artistic, unexpected look. Just make sure the mirror still works for your daily needs.

How Do I Match My Mirror to the Rest of the Bathroom?

Mirror size is one thing, but let’s not forget style.

Think about your tapware, light fixtures, even the colour of your walls. A heavy wooden frame might suit a rustic bathroom but feel out of place in a sleek, monochrome space. Frameless mirrors? They’re timeless and versatile, blending in just about anywhere.

And if you want a bit of tech—hello, LED lighting or demister pads—opt for something modern and functional. Our sleek illuminated mirror options are perfect for a polished, high-performance bathroom look.

Is There a Best Mirror for Small Bathrooms?

Absolutely. Small spaces benefit hugely from clever mirror choices. Go for a mirror that maximises light—either by being large or incorporating integrated lighting.

Tall, narrow mirrors can elongate a wall and create a feeling of height. Mirrored cabinets are another smart pick, offering storage without sacrificing style.

The trick is to avoid chunky frames or anything too ornate that might feel heavy in a tight area.

Final Thoughts

Choosing the right mirror size for your bathroom isn’t rocket science, but it does require a bit of planning. It’s about proportions, yes, but also about how you want the space to feel. Open and airy? Go big and frameless. Warm and detailed? Something more ornate might do the trick.

Above all, remember: the right mirror should reflect more than just your face. It should reflect the mood, style, and functionality of your bathroom too.