By Beverly Gene, Design Consultant, Claris Company. Every measurement in this guide is checked against the specification sheets of the mirrors we build, and re-checked when the guide is updated.
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 starting points, 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.
Key takeaways
- For a rectangular mirror, start 2 to 4 inches narrower than the vanity on each side. For a round mirror, start at 70 to 80 percent of the vanity width.
- Hang it 5 to 10 inches above the countertop, with the centre at eye level, around 58 to 65 inches from the floor.
- On a double vanity, choose one wide mirror for a clean line or a matched pair for symmetry.
- Every number here is a starting point, not a rule. The room decides the final size.
- If no standard size fits the wall, we cut to the size you need.
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.
| Vanity width | Rectangular mirror width | Round mirror diameter |
|---|---|---|
| 24 in | 18 to 20 in | 18 to 20 in |
| 30 in | 24 to 26 in | 22 to 24 in |
| 36 in | 28 to 32 in | 24 to 30 in |
| 42 in | 34 to 38 in | 30 to 34 in |
| 48 in | 40 to 44 in | 34 to 38 in |
| 54 in | 46 to 50 in | 36 to 40 in |
| 60 in (single) | 52 to 56 in | one round, or a pair |
| 60 to 72 in (double) | one 60 to 66 in, or two 24 to 30 in | a pair of 28 to 34 in |
A word on the numbers above
These are recommendations, not rules. They are where a designer starts, not where every room ends. A tall ceiling, a wide backsplash, an off-centre basin, a window too close to the wall, a client who simply wants a bigger piece: any one of those moves the answer, and none of them is wrong. Plenty of the best bathrooms we have supplied break the table on this page. Use it to get close, then trust the wall.
What fits, vanity by vanity
The table gives you the range. This is what actually hangs on the wall: the honest advice for each standard vanity width, the closest pieces in the Claris catalogue, and a plain note wherever the two differ.
For a 24 inch vanity
The advice: 18 to 20 inches wide, centred on the basin. A small vanity crowds fastest, so the inset matters more here than anywhere.
The Claris fit: DIANO WHITE, a slender 21.5 inch pill, is the closest piece in the catalogue. On a 24 inch vanity it runs close to the edges, a deliberate full-width look that suits a compact bath.
The exact fit: we cut rectangular models to 18 or 20 inches on request.
For a 30 inch vanity
The advice: 24 to 26 inches for a rectangle, 22 to 24 for a round.
The Claris fit: MORENO at 24 by 32 is the textbook answer, three inches inside each edge, with a frosted frame that carries the light. DIMO at 24 by 32 is the front-lit alternative.
For a 36 inch vanity
The advice: 28 to 32 inches for a rectangle, 24 to 30 for a round.
The Claris fit: VIANO at 29.5 sits inside the band, in black or white matte. ORSO's 32 inch circle is the bolder call, a step past the textbook and worth it when the mirror is the feature of the room.
For a 48 inch vanity
The advice: 40 to 44 inches for a rectangle, 34 to 38 for a round. It does not have to go full width.
The Claris fit: VIANO at 37.5 is the textbook round. ORO Light or MORENO at 36 by 30 keep a rectangle deliberately narrower. EVOLUTION at 47 is the full-width route, with the 5x magnifier earning the width.
The exact fit: a 40 to 44 inch rectangle is a custom cut away.
For a 60 inch double vanity
The advice: one mirror at 52 to 56 inches, or a matched pair with each mirror centred on its own basin.
The Claris fit: for a pair, two VITAs at 26 inches each, two BUTTERFLY wings mounted left and right so they open outward and frame the basins, or two ORO Lights at 24 by 32 in brushed gold. For one mirror, ACARI runs the full 60 inches.
The exact fit: a 52 to 56 inch single cuts to order.
For a 72 inch vanity and wider
The advice: 60 to 66 inches kept inside the edges, or full width as a statement.
The Claris fit: ACARI at 60 for the inset look. BOCA at 72 or 78 when one mirror should carry the wall.
If the numbers and the catalogue never quite meet on your wall, that is not a failure of either. There is no one mirror that fits every bathroom, and there was never meant to be: basins sit off-centre, sconces land where the electrician could reach, and walls come in every width except the one in the table. Customization is how the catalogue stops being a limit. Every Claris model cuts to the size the project calls for, on the same glass and the same five-year warranty, with the lead time confirmed in your quote. Read how to specify a custom mirror, or send us the wall and we will tell you what fits.
How wide should a vanity mirror be?
For a rectangular mirror, a reliable starting point is a width 2 to 4 inches narrower than the vanity on each side. Round mirrors often sit best at 70 to 80 percent of the vanity width. Basin placement, sconces, backsplash height, and the proportion you want all move the final number. Design editors at Homes & Gardens land in the same bracket.
So a 60 inch vanity takes a rectangular mirror of roughly 52 to 56 inches. Frameless glass carries that scale without feeling heavy. A framed piece looks better kept a step narrower.
One honest caveat: the authorities do not fully agree. Some guides run the mirror anywhere from 70 to 90 percent of the vanity width. The difference comes down to frame weight and how much wall you want to show. When in doubt, sit at the narrower 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.
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 runs about 70 to 80 percent of the vanity width, 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 a safe choice.
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.
Round and oval shapes carry a powder room beautifully. COMO offsets its circle and mounts three ways, so the same piece can sit left, centred, or right of the basin. See the rest in our round mirrors and the full range in bathroom mirrors.
When the mirror should not be a rectangle
Every number in this guide assumes the mirror is a regular shape. Some of the best rooms ignore that premise entirely. Design editors at Livingetc call organic and sculptural mirrors the defining bathroom trend of 2026, and the logic is simple: against straight tile, a clean vanity, and hard fixture lines, an irregular silhouette is the one soft thing in the room. The mirror becomes the art.
Sizing changes when the shape does. An organic mirror is placed by visual weight rather than width: keep its widest point inside the vanity edges, then give the silhouette more wall than you would give a rectangle, so the curve has room to register. STONE turns raw asymmetric rock into a clean modern form; PEBBLE hangs four ways, so one piece can suit the wall rather than the other way around.
Designers already work this way. When Phoenix Grey built two powder rooms around custom tinted Claris pieces, the mirror was chosen first and the room followed. For the full argument, read why asymmetry feels like elegance, or browse the organic mirrors collection.
One mirror or two over a double vanity?
Both work, and this is the one decision on the page where the room really does overrule the numbers. 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 one-mirror route
BOCA is the widest piece we make, front-lit with a clean illuminated outline, built for the double vanity where a single mirror should carry the whole wall. ACARI is the same idea a size down, front-lit through Belgian glass, and it doubles as a makeup wall.
The matched-pair route
For a pair, line each mirror up with its own basin and its own light, not with the vanity as a whole. Leave enough wall between them that they look like two deliberate pieces rather than one mirror with a gap in it. Four inches is a common minimum, though a wide sconce or a tall tap can easily make the right answer six or eight.
DIANO is our recommendation for most paired vanities. It is a slender backlit pill in matte stainless steel, calm and exact, and two of them over a double vanity give each basin its own piece without either one shouting. It comes in black or white, so the pair can disappear against pale plaster or hold a line against dark stone. Wave Motion control means the glass stays clean between two people using it every morning.
BUTTERFLY is the other kind of pair. It is a single asymmetric wing sold as a left or a right piece, so mounted together the two wings open outward and frame the basins below. Specify it when the mirrors are meant to be the feature of the room rather than the quiet part of it.
Let the wall decide. If it is already busy with tile, a window, or pattern, one large mirror keeps things 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. Lighting manufacturer Kichler publishes the same planning numbers.
This is where a lit mirror earns its place. A backlit or front-lit mirror puts even 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, the ceiling is unusually tall, or the design calls for a shape no standard stocks. That is when a made-to-measure mirror earns its keep, and it is the reason the table on this page is a starting point rather than a limit. 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 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 and the trade-side numbers in how to specify architectural mirror dimensions, 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 a rectangular mirror 2 to 4 inches inside each edge of the vanity, and a round at 70 to 80 percent of its width, centred over the basin without crowding the sconces. Treat it as a starting point: a tall ceiling or a wide backsplash can justify going larger.
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.
What size mirrors work over a 60 inch double vanity?
A matched pair sized to the basins works best: two mirrors of roughly 24 to 28 inches, each centred on its own basin with at least 4 inches of wall between them. For one mirror instead, use a single piece of about 52 to 60 inches. Both routes are standard practice; the wall and the sconces decide.
Can a mirror be wider than the vanity?
It can, and sometimes it should. Designers usually keep the mirror inside the vanity edges because a wider piece tends to crowd the sconces and overwhelm the cabinet. But a full-wall mirror is a deliberate look, common in hospitality and in small rooms that need the light. It is a design decision, not a mistake.
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 pair, DIANO is the easiest piece to specify: a slender backlit pill in black or white matte, one centred on each basin.
Sizing guidance is a starting point, not a rule. If you want a second opinion on a specific wall, send us the measurements and we will tell you what fits.
About the author
Beverly Gene is a design consultant with Claris Company, a Toronto architectural mirror studio, and advises designers and homeowners on mirror sizing, placement, and lighting on real projects. This guide reflects those sizing conversations, checked against the specifications of the mirrors Claris builds. Claris makes custom and standard LED mirrors on low-iron Belgian glass, crafted in Europe, and backed by a five-year warranty. About us, partner with us, or get in touch.
