Choosing the right mirror size isn’t just about aesthetics — it’s about balance, functionality, and creating a space that feels tailored to your bathroom. Whether you're styling a single vanity or designing a luxurious double setup, the right LED smart mirror can completely transform the look and feel of your space.
In this expert guide, we’ll walk you through how to find the perfect mirror size for any bathroom vanity, from powder rooms to master ensuites.
Choosing the right mirror size isn’t just about aesthetics — it’s about balance, functionality, and creating a space that feels tailored to your bathroom. Whether you're styling a single vanity or designing a luxurious double setup, the right LED smart mirror can completely transform the look and feel of your space.
In this expert guide, we’ll walk you through how to find the perfect mirror size for any bathroom vanity, from powder rooms to master ensuites.
1. Understand the Mirror-to-Vanity Ratio Rule
As a general rule of thumb, your mirror should be 2 to 4 inches narrower than your vanity on each side. This ensures the mirror looks proportionate and centred above the basin without overwhelming the space.
Example:
For a 900mm vanity, aim for a mirror around 800mm wide
For a double 1500mm vanity, choose a mirror around 1300mm wide — or two 600–700mm mirrors side by side
2. Single vs Double Vanity — What's the Best Fit?
For Single Vanities:
Width: Keep the mirror 100–200mm narrower than the vanity
Shape: Round, arched, and pill mirrors work beautifully over single vanities
Height: At least 700–800mm is ideal for visibility and lighting
Width: Keep the mirror 100–200mm narrower than the vanity
Shape: Round, arched, and pill mirrors work beautifully over single vanities
Height: At least 700–800mm is ideal for visibility and lighting
For Double Vanities:
Option 1: One large horizontal mirror for seamless style
Option 2: Two identical mirrors above each basin for a balanced look
Consider models with integrated LED lighting to ensure even coverage across both users
3. Match Your Mirror Height to Your Ceiling and Lighting
A common mistake? Choosing a mirror that’s too short. For most bathrooms, especially those with LED smart mirrors, you want a height of at least 700mm–900mm.
Low ceilings (2400mm): Go for vertical mirrors to elongate the room
High ceilings (2700mm+): You have flexibility — tall mirrors or rounded tops work well
Also consider wall lighting or sconces when selecting a mirror. If your mirror includes LED lighting, it replaces the need for wall-mounted fixtures, giving you a cleaner look.
4. Go Frameless for a Sleek, Custom Look
Frameless mirrors feel more modern and create a seamless connection with tiles and vanities. If you want a floating, spa-like aesthetic, a frameless mirror is ideal.
Prefer a bold contrast? Try our framed LED mirrors in matte black or brushed gold to tie in your tapware and accessories.
🔗 Browse framed styles like the Framed Amalfi or Framed Positano
5. Choose Function With Style: Smart Mirror Features
When selecting a mirror size, also consider which features will enhance your daily routine:
Demister pad (great for fog-free mornings)
Dimmable lighting (ideal for makeup and winding down at night)
Bluetooth speakers (turn your bathroom into a private retreat)
Touch or motion sensors (for seamless, clean activation)
Quick Mirror Sizing Reference Guide
Vanity Width Recommended Mirror Width
| 600mm | 500–550mm |
| 750mm | 650–700mm |
| 900mm | 750–850mm |
| 1200mm | 1000–1100mm or two 500–600mm |
| 1500–1800mm | 1300–1600mm or two 600–800mm |
Final Thoughts
Choosing the perfect mirror size is all about proportion, function, and flow. Whether you’re creating a minimalist space or a luxury statement ensuite, the right mirror enhances light, adds dimension, and brings harmony to your bathroom.
Still unsure which size is right for your space?
Explore our curated collection of LED smart mirrors by size and style — or reach out for expert guidance.