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The Complete Bathroom Vanity Size Guide

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Small bathroom with subway tile

Maya Mogdahan

In this article, we’ll discuss how to measure everything in your bathroom for problem-free planning. However, keep in mind the advice of Maya Moghadam, Owner of Maya’s Design Studio: 

“As a designer, I recommend having a professional contractor measure all the unique requirements. They know how to measure correctly so that you don’t waste your money or time.” 

Maya and her team can recommend a contractor, create an e-design, and shop with you to help turn your bathroom into a haven in your home.

Maya’s Design Studio offers virtual services all over the world. To get a free 20-minute consultation on your bathroom design or remodel, click the button below, choose a time that’s convenient, and be sure to mention that you came from Bathtubber:

Not sure how large your bathroom vanity should be? Struggling to find a mirror that matches it perfectly? It may not seem like a big deal but getting the right proportions will elevate your design, welcome in natural light, and create the illusion that your bathroom is larger and more open than it truly is. Yet, finding the right sizes isn’t always as easy as it sounds.

Although there are standard heights for bathroom vanities, you can find a variety of widths, depths, and customizable sizes. Comfort vanities, floating vanities, and double vanities have different dimensions and will require different considerations when sizing bathroom vanity sinks, mirrors, light fixtures, and cabinetry.

This guide will explain everything you should know to find the perfect size vanity for your bathroom remodel. There might not be official codes or regulations mandating how large your vanity can be but there are some stylistic guidelines you should follow. Keep reading and apply what you learn to your overall bathroom decor.

Standard Vanity Sizes

When it comes to bathroom vanities, the label “standard” refers to the size of the vanity, not a particular style. Standard vanities are simply built to industry-standard sizes.

Most bathroom vanities come with countertops made of quartz, marble, granite, wood, porcelain, concrete, and laminate. Some bathroom vanities also come with sinks.

Generally, your local hardware and home appliance store will stock standard vanities unless you specifically request otherwise.

Standard Vanity Height

Standard vanities are between 30-32 inches (76.2-86.3 cm) tall. This may be too short if you are taller than average.

For example, if you are taller than 6 feet (182.2 cm), a 30 inch (76.2 cm) vanity will sit below your waistline, forcing you to bend over to use the sink.

However, if you are of average height or have children, a standard vanity will be the perfect size.

To learn much more about vanity heights and how to find the right vanity if you’re 6 foot tall or more, read THIS Is How High Your Bathroom Vanity Should Be.

Standard Vanity Depth

Standard vanities are 20-21 inches (50.8-53.4 cm) deep. Depth refers to the area from the cabinet door to the back of the vanity. If your bathroom is smaller, you’ll have to find a vanity that isn’t too deep or the cabinet doors can block the walkway. If your bathroom is rather narrow, you can find slimmer vanities that measure around 18 in (45.7 cm).

Standard Vanity Width

Even standard-sized vanities come in a variety of widths. Most standard vanities measure 24-72 inches (60.9-182.8 cm) wide, with specific sizes set at 24, 30, 36, 48, 60, and 72 inches (60.9, 76.2, 91.4, 121.9, 152.4, 182.8 cm, respectively). The width refers to the distance from left to right, so be sure to measure your bathroom to find the perfect size.  

Comfort Vanity Sizes

Comfort vanities—or comfort height vanities—are built for taller people who struggle to comfortably use standard-sized countertops. These bathroom vanities are slightly taller and larger to accommodate more height. You may have to custom order a comfort vanity.

Comfort Vanity Height

Comfort vanities are slightly taller than standard vanities, usually rising 36 inches (91.4 cm) off the ground. They are designed to accommodate the slightly taller average height of Americans compared to standard heights of 100 years ago. However, comfort vanities may not be suitable for children.

Comfort Vanity Depth

Comfort vanities are usually no deeper or shallower than standard vanities, generally measuring between 20-21 inches (50.8-53.3 cm) deep. You can find slimmer options if your bathroom is not wide enough to accommodate a deep vanity.

Comfort Vanity Width

Likewise, comfort vanities are usually no wider than standard vanities. Depending on the size of your bathroom, you can find vanities measuring 24, 30, 36, 48, 60, and 72 inches (60.9, 76.2, 91.4, 121.9, 152.4, 182.8 cm, respectively) wide.

Floating Bathroom Vanity Sizes

Floating vanities are a relatively new style and create the illusion that your sink is floating in mid-air. By mounting the vanity to a wall, you can theoretically place it as high off the ground as you like. Some floating vanities come with a built-in cabinet, while others simply consist of a floating countertop and sink.

Floating Vanity Height

As floating vanities are mounted to the wall, you could theoretically place them as high or low off the ground as you like. However, most contractors will install a floating vanity around 32 inches (81 cm) above the ground, as measured from the top of the counter. If you want your floating vanity installed higher, speak with your contractor or install it yourself.

Floating Vanity Depth

Just like comfort and standard vanities, floating vanities usually measure between 18-21 inches (45.7-53.3 cm) in depth. Not all floating vanities have cabinets, though, so this measurement would refer to the depth of counter space you have on your vanity countertop.

Floating Vanity Width

Floating vanities generally stick to the same industry standard widths, measuring from 24-72 inches (60.9-182.8 cm) wide. For wider options, you’ll have to custom order a vanity built to your specifications.

How Do Double Vanities Compare?

white double vanity with sliding barn doors
Click to go to Etsy.com and read more about this White Double Vanity with Sliding Barn Doors from Southern Sap Woodworks.

Double vanities are vanities built with two sinks. They are generally built to standard heights unless you specifically request a comfort height double vanity. 

As for their width, double vanities usually measure between 60-72 inches (152.4-182.3 cm) inches across. This puts them at the upper end of the standard vanity width. 

As for their depth, you can find narrow double vanities but most measure around 21 inches (53.5 cm) deep.

Vanity Size Overview

Find a quick overview for the dimensions of most bathroom vanities here:

HEIGHT (in/cm)WIDTH (in/cm)DEPTH (in/cm)
STANDARD VANITIES30-32 in (76.2-81 cm)24-72 in (60.9-182.8 cm) 18-21 in (45.7-53.3 cm)
COMFORT VANITIES36 in (91.4 cm)24-72 in (60.9-182.8 cm) 18-21 in (45.7-53.3 cm)
FLOATING VANITIES30-32 in (76.2-81 cm) 24-72 in (60.9-182.8 cm) 18-21 in (45.7-53.3 cm)
DOUBLE VANITIES30-32 in (76.2-81 cm)24-72 in (60.90182.8 cm) 18-21 in (45.7-53.3 cm)

Other Considerations for the Size of Your Bathroom Vanity

The size of your bathroom will largely dictate how large of a vanity you can buy but keep in mind that the vanity isn’t the only thing you have to consider. Also, include these features in your measurements or you won’t have enough room:

Bathroom Mirror

Be sure to measure the distance between the top of your vanity and the ceiling. If your bathroom has low ceilings, you won’t have as much room for a large mirror. (More on how to measure for a bathroom vanity mirror coming up later in this post.)


Most homeowners install lights either above the bathroom mirror or around the mirror using sconces. Whichever style you prefer, be sure to measure the available space and leave enough room for lights. This means measuring the width and height of your vanity to guarantee that the lights you want will fit within the area of the vanity.

To learn more about vanity lighting, read the post How to Choose the Best Bathroom Vanity Lights and How to Choose the Best Bulbs for Your Bathroom Vanity.

Mounted Shelves and Cabinets

Remember, your vanity will have a mirror hanging above it. The mirror should be just a bit slimmer than the width of your vanity so, if you have mounted shelves or cabinets on either side, the mirror will need enough space to fit between the cabinets. Otherwise, you’ll have to remove and reinstall the cabinets to make space for a larger vanity.

Wall Space

If you want to recess your vanity into an alcove, you’ll have to measure the exact dimensions of the space before picking out a design. Leave enough room to easily squeeze the vanity into place, otherwise, you’ll be jamming it into the alcove.

Planning a complete remodel of your bathroom requires accurate measuring of all bathroom fittings. Take a look at our guide on How to Measure EVERYTHING in Your Bathroom for tips on how to measure correctly.

How to Position a Mirror and Lights Over Vanity

marble slab vanity backsplash

Although you could theoretically pick any sized mirror to hang above your vanity, the size of your vanity and bathroom will largely dictate how large of a mirror you need.

Picking a mirror that is too large or too small will warp the size of your bathroom and ruin your overall design plan.

Follow these style guidelines to find the perfect size vanity and mirror for you:

 Bathroom Vanity to Mirror Proportions

As a standard rule, your bathroom mirror should not be wider than the vanity. 

Oversized mirrors dwarf your vanity, making your bathroom look smaller than it actually is. Instead, try to find a mirror that is 4 inches (10.1 cm) narrower than your vanity’s countertop. If your vanity is especially narrow, you can decrease that distance to 2 inches (5 cm).

The height of your mirror will be limited by these three factors:

  • Your ceiling – The bathroom mirror should not extend all the way to the ceiling, nor should it extend all the way to your vanity. Ideally, leave a 5-inch (12.7 cm) gap between the top of the mirror and the ceiling if you have low ceilings. If you have high ceilings, avoid installing a mirror all the way to the ceiling. It would look out of place and odd.
  • Lights and wall fixtures – Many homeowners decide to install lights above their bathroom mirror, helping to illuminate their reflection. Leave enough space between the top of the mirror and the ceiling to install lights if you wish to do so. If you have low ceilings, you may need a smaller mirror if you’ve purchased a comfort height vanity. This post provides a designer’s advice about how to position your bathroom mirror and sconces over the vanity.
  • The width of the mirror – The width and height of your mirror should be as proportional as possible. Narrow, tall mirrors usually only work with makeup stands whereas wide, short mirrors are best left to carnivals. This doesn’t mean you have to buy a square mirror, though. Circular mirrors, rectangular mirrors, and uniquely shaped mirrors all work as long as they’re proportional.

These proportions will keep your mirror and vanity in proportion with each other, helping to streamline your design and open up the space.

For more information, read my in-depth guide How to Pick the Perfect Size Bathroom Mirror for Your Vanity.

In addition to your vanity, the bathroom mirror should also be proportional to the sink. Never buy a bathroom mirror that’s narrower or smaller than the sink. It is impractical and will make your bathroom and vanity look much smaller than they really are. Your eye will be pulled inward, drawing attention away from the rest of your design.

See my size chart in What’s the Perfect Size Bathroom Sink for Your Vanity? 

Picking Mirrors for Double Vanities

Double vanities are much wider than single vanities, usually measuring between 60-72 inches (152.4-182.8 cm). With this much space, you have a couple of options for mirrors:

  • One mirror – You could install a single mirror that spans from left to right across the entire space. This creates a panoramic view.
  • Two mirrors – If you want a classic look, install a single mirror above each of the two sinks. Both mirrors should be identical, extending slightly past the width of each sink but never extending past the width of the vanity. Try to leave 10 inches (25 cm) of space between both mirrors.

Sizing Your Vanity and Sink

Bathroom vanity revamp in progress – Image courtesy of Maya’s Design Studio

To get an extended FREE consultation on your bathroom design or remodel, and advice on measuring, click the button below. Be sure to mention that you came from Bathtubber.

The last thing you should consider as you’re sizing your bathroom for a new vanity is the sink and faucet. 

Most bathroom vanities come with a pre-installed sink but you usually have to purchase faucets separately. Learn more in my post Do Bathroom Vanities Come With Sinks and Faucets?

Although vanities are built according to industry-standard sizes, sinks are not built to a standard. Some sink basins are only large enough for you to wash your hands in while others are large enough to wash your hair or even a shirt.

Circular bathroom sinks usually measure between 16-20 inches (40.6-50.8 cm), while rectangular sinks usually measure between 19-24 inches (48.5-61.2 cm). Also, sinks are usually between 5-8 inches (12.7-20.4 cm) deep.

Vanities that include sinks usually come with under-mount or drop-in sinks. 

Undermount sinks connect to the vanity from below. Drop-in sinks have a slight lip that fits onto the countertop. Both configurations should have pre-drilled holes for a faucet.

Read my post Classic to Contemporary: 17 Bathroom Sink Styles to learn which style will work best for your bathroom.

Aligning the Mirror and Faucet

When you look for a faucet, keep in mind that the mirror should never hang below its highest point. If the mirror hangs below the top of the faucet, water can splash behind the mirror, causing mold and mildew to grow in the crevices. However, installing a bathroom vanity backsplash can help prevent this.

How to Protect Your Vanity from Water Damage

wainscot bathroom vanity backsplash

Generally speaking, unless you have a pedestal sink, you should install a backsplash to protect the wall behind your sink. Align the top of the backsplash slightly above the mouth of your faucet to catch any stray water droplets.

Most standard backsplashes are designed to be 4 inches tall, leaving plenty of space between your countertop and the mouth of the faucet. This eliminates the need to worry about your mirror, back wall, and the rest of your vanity.

Although a backsplash will help protect your walls, mirror, and vanity from immediate water spray, you should take extra precautions to protect your vanity from water damage. Water damage is the number one reason why mold and mildew grow in the bathroom, causing untold damage to your home and health.

Prevent these issues by properly installing your vanity with caulk. Caulk will help seal your backsplash and vanity in place, preventing water from dripping through the cracks. To properly caulk your vanity:

  1. Find a silicone-based caulk that matches the color of your vanity or backsplash. White may seem like a smart choice but it can create harsh contrast. I recommend clear caulk instead.
  2. Use a caulking gun to lay perfectly straight lines of caulk across the back of your backsplash and between the edges of your vanity and faucets.
  3. Let the caulk dry completely before exposing it to water. Clear away any spillage before it dries to achieve a professional look.

We recommend applying caulk around the edges of your faucet and handles to secure them in place and prevent drainage problems. Read Should You Caulk Around a Bathroom Vanity for more information.

Sizing a New Bathroom Vanity: Final Thoughts 

tile to ceiling backsplash

Before you buy just any vanity, be sure to account for the following:

  • The size of the vanity – How will the vanity fit in your bathroom? Consider the height, width, and depth.
  • The size of the mirror above the vanity – Will you have enough room to install your preferred mirror and lights above your vanity?
  • The faucet and sink – Will you have to buy a separate faucet and, if so, what size faucet do you need?
  • Sealing your vanity – Don’t forget to seal your vanity, faucet, and backsplash with caulk to keep them safe from water damage long into the future.

Investing in a new bathroom vanity might seem like a simple way to freshen up your interior design but there’s a lot more to it than meets the eye. With these size guidelines in mind, your bathroom vanity can greatly enhance your bathroom decor. Read 8 Tips to Pick the Perfect Bathroom Vanity to get all of our most helpful resources on the topic.

Note: If you’re buying a vanity as part of a bathroom remodel, be sure to fill out the form below. I’ll send you my Save Big $$$ Cheat Sheet. It’s got designer hacks that can literally help you save thousands of dollars on your project.

Tags: bathroom vanity, size guide, vanity lights, vanity mirror, vanity sink

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