Choose a bathroom mirror a little narrower than your vanity, roughly 75 to 95 per cent of its width: a 900mm vanity suits a mirror 700 - 850mm wide, and the chart below covers every standard vanity size. Hang it with the bottom edge 100 - 250mm above the vanity top and clear of the tap, so the eye level of everyone who uses it falls inside the glass.
You use the bathroom mirror every day, yet it is often chosen last, once the vanity and tiles are already in. Settle its size and height while the room is still being planned and you can place the wall lights, cabinet and power where they belong. For mirrors elsewhere in the house, see our Mirror Sizes Guide.
Bathroom Mirror Sizes by Vanity Width
| Vanity Width | One Mirror | Mirror Height | Two Mirrors |
|---|---|---|---|
| 600mm | 450 - 550mm | 700 - 900mm | Not needed |
| 750mm | 600 - 700mm | 750 - 950mm | Not needed |
| 900mm | 700 - 850mm | 800 - 1000mm | Not needed |
| 1200mm | 1000 - 1100mm | 800 - 1000mm | 2 x 450 - 500mm |
| 1500mm | 1200 - 1400mm | 850 - 1100mm | 2 x 550 - 650mm |
| 1800mm | 1400 - 1700mm | 900 - 1200mm | 2 x 650 - 750mm |
These widths match the six standard vanity sizes in our Bathroom Vanity Size Guide. If your vanity has a stone top that overhangs the cabinet, measure the top, because that is the edge the eye compares the mirror with.
Why the Mirror Should Be Narrower Than the Vanity
A mirror wider than the vanity looks as though it has slipped off its base. Australian bathroom suppliers advise the same width as the vanity at most, and usually a little narrower. Bringing the mirror in at each side frames it against the wall and leaves room for wall lights.
If you plan wall lights either side, go narrower again. Our Wall Light Height Guide places vanity lights 100 - 150mm out from the edge of the mirror, so on a 900mm vanity a 700mm mirror puts the lights roughly in line with the edges of the vanity.
Off-the-shelf bathroom mirrors in Australia come in a handful of common sizes, including 600 x 750mm, 600 x 900mm, 900 x 750mm, 900 x 900mm, 1200 x 800mm and 1500 x 900mm. Choosing one of these keeps your options open if you ever replace the mirror.
How High to Hang a Bathroom Mirror
Most Australian vanities stand 850 - 900mm high. Leave 100 - 250mm between the vanity top and the bottom of the mirror, enough to clear the tap and stop splashes reaching the glass. With a tall basin mixer or a wall spout, keep the bottom of the mirror at least 100mm above the top of the tap. Over a tiled splashback, the mirror can sit on the line of the tiles.
Then check the top. Based on average Australian adult heights, eye level falls roughly 1500 - 1650mm above the floor for most people, and the mirror should cover it with room to spare, so its top usually lands 1800 - 1950mm from the floor. In a family bathroom, stand the shortest and tallest users in front of a strip of masking tape before anything is drilled.
Bathroom Mirror Above a 900mm Vanity
Double Vanity: One Mirror or Two?
Over a double vanity, one wide mirror makes a small ensuite feel larger and is easier to clean around. Two mirrors, each centred over its own basin, give each person their own space and suit traditional bathrooms, where a pair of framed or arched mirrors looks deliberate. With two mirrors, leave enough wall between them for a third wall light or a towel hook, and line the tops up exactly.
Round, Oval, Arch and Pivot Mirrors
Shape changes how big a mirror reads. Round bathroom mirrors are usually 600mm, 700mm or 800mm across; a 600mm round suits a 750mm vanity and an 800mm round a 900mm vanity, because a circle looks smaller than a rectangle of the same width. Arches are usually sized as portrait rectangles, such as 600 x 900mm, and add height to a low room.
Pivot mirrors hang between two brackets and tilt, which suits a period bathroom and lets taller and shorter users angle the glass. The ZyraLarge Rectangle Pivot Mirror, Brushed Brass is 700mm wide and 830mm tall, a good fit over a 900mm vanity. Allow for the brackets in the overall width.
Arch Mirror 600 x 900mm Frameless: 600mm wide and 900mm tall
Rafael Oval Pivot Mirror, Brushed Brass: 708mm wide and 838mm tall
LED Mirrors, Demisters and Wall Lights
Most LED and demister mirrors are hardwired, and in every Australian state a hardwired fitting must be connected by a licensed electrician. AS/NZS 3000, the Wiring Rules, divides a bathroom into zones around the bath and shower: Zone 1 above the bath or shower base, and Zone 2 a further 600mm out, up to 2.25m above the floor. A fitting in Zone 2 needs at least IPX4. Manufacturers' instructions add their own limits, and many LED mirrors are rated IP44 and must not be fitted above a bath or inside a shower.
The rules also set a small zone around the basin itself, so tell your electrician the mirror's position and power point before the wall is sheeted. Our Bathroom Lighting Ideas guide covers the zones in more detail.
Antonia Oval LED Mirror 600 x 800mm: 600mm wide and 800mm tall
Mirror Glass and Accessible Bathrooms
Glass in Australian homes is covered by AS 1288, and glass in a bathroom generally has to be safety glass. Ordinary mirror glass is acceptable only when it is fully adhered to the wall, or sits wholly behind a vanity or bench at least 760mm high and 300mm deep. A mirror on clips or in a frame, or one beside a shower or bath, should be safety-backed mirror. Your glazier will confirm the grade.
AS 1428.1, the standard for accessible public buildings, is a useful benchmark for an accessible bathroom at home. Its 2009 edition asks for a mirror at least 350mm wide, running from no higher than 900mm to at least 1850mm above the floor, so a seated and a standing person can both use it, and tilting mirrors aren't recommended. The 2021 edition, referenced by the National Construction Code since July 2025, sets a minimum mirror height that depends on whether the mirror sits above or beside the basin, so check the current edition with your designer.
Shaving Cabinet or Mirror?
If the vanity has little storage, or you have a pedestal basin with none, a mirrored shaving cabinet gives you a mirror and a cupboard in one. It projects further from the wall than a flat mirror, so check that its doors clear the wall lights and tap. Our Medicine Cabinet Size Guide covers cabinet widths, depths and heights.
Bathroom Mirrors in Our Range
| Mirror | Shape | Width x Height | Suits a Vanity Of |
|---|---|---|---|
| Reba Round Mirror 600mm Urban Brass | Round | 600mm | 750mm |
| Arch Framed Mirror 600 x 900mm Matte Black | Arch | 600 x 900mm | 750mm |
| Zyra Small Rectangle Pivot Mirror, Brushed Brass | Pivot rectangle | 602 x 638mm | 750mm |
| ZyraLarge Rectangle Pivot Mirror, Brushed Brass | Pivot rectangle | 700 x 830mm | 900mm |
| Rafael Oval Pivot Mirror, Brushed Brass | Pivot oval | 708 x 838mm | 900mm |
| Reba Round Mirror 800mm Urban Brass | Round | 800mm | 900mm |
| Luciana LED Mirror 1200 x 700mm | LED rectangle | 1200 x 700mm | 1500mm |
Frequently Asked Questions About Bathroom Mirror Sizes
How High Should a Mirror Be Above a Vanity?
Leave 100 - 250mm between the vanity top and the bottom of the mirror, and at least 100mm above the top of a tall mixer or wall spout.
What Is a Standard Bathroom Mirror Size?
Common Australian sizes include 600 x 750mm, 600 x 900mm, 900 x 900mm and 1200 x 800mm. The right one depends on the width of your vanity.
Should a Bathroom Mirror Be the Same Width as the Vanity?
It can be the same width, but never wider. Most bathrooms look better with a mirror a little narrower, roughly 75 to 95 per cent of the vanity's width.
What Size Mirror Suits a 900mm Vanity?
A mirror 700 - 850mm wide and 800 - 1000mm tall, or an 800mm round mirror.
What Size Mirror Suits a 1200mm Vanity?
One mirror 1000 - 1100mm wide, or two mirrors 450 - 500mm wide if the vanity has two basins.
How High Should a Bathroom Mirror Be From the Floor?
On a standard 850 - 900mm vanity, the bottom of the mirror usually sits 950 - 1150mm from the floor and the top 1800 - 1950mm.
Do LED Mirrors Need an Electrician?
Yes. A hardwired LED or demister mirror must be installed by a licensed electrician, who will check it suits its position under the Wiring Rules.
Related Guides
More from our bathroom guides:
- Medicine Cabinet Size Guide - shaving cabinet widths, heights and depths
- Mirror Sizes Guide - mirror sizes for the rest of the house
- Bathroom Vanity Size Guide - the six standard vanity widths
- Wall Light Height Guide - placing lights either side of the mirror
- Bathroom Lighting Ideas - wet area zones and IP ratings explained
- Wall Sconce Height Guide - how sconce styles change placement
- Pedestal Basin Size Guide - basin sizes for bathrooms without a vanity
- Bathroom Basin Size Guide - the four most common basin widths
Shop Bathroom Mirrors
Browse the full range or jump straight to a category below.
- Bathroom Supplies and Fittings - browse every bathroom category in one place.
- Bathroom Mirrors - round, arched, pivot and LED mirrors.
- Medicine Cabinets - mirrored shaving cabinets with storage.
- Bathroom Vanities and Cabinets - vanities to size your mirror against.
- Bathroom Lighting - wall lights and fittings for the vanity.
- Wall Sconces - fittings to flank the mirror.
- Bathroom Basin Tapware - mixers and spouts to clear the mirror.
