What Size Mirror for Your Vanity? A Complete Sizing Guide

By the Claris design team, Toronto. Checked against the mirrors we build.

Choosing a vanity mirror looks simple until you are standing at the wall with a tape measure. Too small and it floats. Too wide and it crowds the sconces. The good news is that designers work from a few clear rules, and once you know them the decision takes minutes. This guide gives you the numbers, a quick sizing table, and the judgment calls that the table cannot make for you. If you want the wider view on what separates a good mirror from a cheap one, start with what makes a quality bathroom mirror.

Quick answer: vanity width to mirror size

Use this as your starting point, then adjust for your faucet, your sconces, and the look you want. Widths are in inches.

The table assumes a frameless or slim mirror. A heavy frame should stay a little narrower so it does not feel boxed in.

How wide should a vanity mirror be?

As a rule, the mirror runs about 70 to 80 percent of the vanity width, or 2 to 4 inches narrower on each side. That keeps the mirror centred over the basin and stops it from overpowering the cabinet below. Design editors at Homes & Gardens and the team at Madeli both land in this range.

So a 60 inch vanity takes a mirror of roughly 42 to 48 inches at the conservative end. If you want a fuller, more contemporary look, you can run a frameless mirror closer to the vanity width, up to about 56 inches. Frameless glass carries that scale without feeling heavy. A framed piece reads better kept narrower.

One honest caveat: the authorities do not fully agree. Some put the range at 70 to 90 percent, which pushes the mirror wider. The difference comes down to frame weight and how much wall you want to show. When in doubt, sit at the lower end. A mirror a touch too small looks intentional. One that crowds the sconces does not.

In the briefs we build for designers, the correction we make most often is a mirror ordered too wide for its sconces. So when a measurement sits right on the line, we cut to the narrower number.

How high should you hang a vanity mirror?

Hang the mirror 5 to 10 inches above the countertop, or above the highest point of the faucet, and centre it at eye level, roughly 58 to 65 inches from the floor. That gap leaves room for a backsplash and a tall tap while keeping your reflection where you actually use it. The guidance from Robern matches this closely.

Eye level is the part people get wrong. You sometimes see a figure of 38 inches to the mirror centre, but that is countertop height, not eye height. Centre the glass where the average user looks, near 60 to 65 inches, and raise it if the household is tall.

If your bathroom needs to meet accessibility standards, the 2010 ADA Standards for Accessible Design set the bottom edge of the reflecting surface at a maximum of 40 inches above the floor above a counter. Worth checking on any project that has to be compliant.

What size round mirror fits a vanity?

A round mirror follows the same 70 to 80 percent rule, measured by diameter. A 36 inch vanity takes a 24 to 30 inch round, and a 48 inch vanity takes 34 to 38 inches, with 36 inches as the sweet spot. The buyers' guides at ACE Decor and George Furniture set out the same brackets.

Centre a round mirror at 58 to 65 inches from the floor, the same as a rectangle. The mistakes to avoid are at the edges. Under 30 inches on a large vanity and the mirror floats with too much blank wall around it. Over 40 inches and it starts to crowd the sconces and the basin. A round mirror is also a smart way to soften a hard, square room.

Round and oval shapes carry a powder room beautifully. See the shapes we hold in our round mirrors and the full range in vanity mirrors, and read why an asymmetric form reads as elegance.

One mirror or two over a double vanity?

Both work. One wide mirror gives a clean, modern line and bounces more light, which makes a small room feel larger. A matched pair gives symmetry, suits shared use, and lets each person have their own light. The teams at ABC Glass & Mirror and WELLFOR frame the trade-off the same way.

For a 60 inch double vanity, that means either one mirror of about 56 to 58 inches or two mirrors of roughly 24 to 28 inches each. If you go with a pair, leave at least 4 inches between them and line each mirror up with its own sink and light, not with the whole vanity.

Let the wall decide. If it is already busy with tile, a window, or pattern, one large mirror reads calmer. If the wall is plain and you want rhythm, two mirrors look more deliberate. For paired layouts, see our double vanity mirrors.

Where does the lighting go?

A light fixture mounted above the mirror should sit 5 to 10 inches above it, around 75 to 80 inches from the floor, and span about 75 percent of the mirror width, never wider than the mirror. Wall sconces work best at eye level, near 65 inches from the floor or 24 to 30 inches above the counter, set on either side of the mirror. The sizing guides from LightsOnline and Kichler back these numbers.

This is where a lit mirror earns its place. A backlit or front-lit mirror puts even, shadow-free light right at the face, which is exactly what a separate fixture struggles to do from above. It also frees up the wall and removes a fixture from the plan. For the full picture, read our designer's guide to LED bathroom mirrors and the case for front-lit mirrors, then browse the lit range in LED mirrors.

When a standard size will not fit

Sometimes the wall simply does not take a catalogue size. A window sits too close, the vanity is an odd width, or the design calls for a shape that no standard stocks. That is when a made-to-measure mirror earns its keep. We cut to your dimensions, shape, finish, and lighting, on low-iron Belgian glass that returns colour, skin tone, and finish without the green cast you get from ordinary glass. If you want the detail on the glass itself, see what makes a Claris mirror clearer.

When we cut a custom piece, the dimension clients most often get wrong is the height off the counter, not the width, so we confirm the faucet height before we quote. Every Claris mirror is crafted in Europe, UL listed, and backed by a five-year warranty, whether it is a catalogue size or a custom build. If you are working to a plan that standard sizes cannot meet, read how to specify a custom mirror, then start a brief with our Concept Studio and we will build to the exact spec.

Frequently asked questions

What size mirror should I get for a 36 inch vanity?

For a 36 inch vanity, choose a rectangular mirror of about 28 to 32 inches wide, or a round mirror of 24 to 30 inches. That keeps the mirror at roughly 70 to 80 percent of the vanity width, centred over the basin without crowding the sconces.

What size mirror fits a 48 inch vanity?

A 48 inch vanity suits a rectangular mirror of about 40 to 44 inches, or a round mirror of 34 to 38 inches, with 36 inches a safe choice. Hang it 5 to 10 inches above the counter and centre it near 60 to 65 inches from the floor.

Can a mirror be wider than the vanity?

It can, but designers rarely advise it. A mirror that runs past the vanity edges tends to crowd the sconces and overwhelm the cabinet. A frameless mirror can match the vanity width for a full look, but going wider usually reads top-heavy.

How high should a bathroom mirror be hung?

Hang it 5 to 10 inches above the countertop or the top of the faucet, and centre the glass at eye level, roughly 58 to 65 inches from the floor. For accessible bathrooms, the ADA caps the bottom reflecting edge at 40 inches above the floor over a counter.

Should a double vanity have one mirror or two?

Either works. One wide mirror gives a clean line and more reflected light. A matched pair gives symmetry and a dedicated light per person. For a 60 inch double vanity, use one mirror near 56 to 58 inches or two of about 24 to 28 inches, with at least 4 inches between them.

Sizing rules are guides, not laws. If you want a second opinion on a specific wall, send us the measurements and we will tell you what fits.