Standard Bathroom Sink Dimensions (with Photos)

Bathroom Sink Dimensions

If you go into a bathroom, it’s a safe bet you’ll at least see a toilet and a sink. However, the style, size, and shape of a bathroom sink can vary widely. But, a few minor points remain pretty constant, no matter what your sink’s design. 

Sink sizes vary broadly based on style, but a typical round bathroom sink is 16 to 20 inches in diameter. A rectangular sink averages 19 to 24 inches wide and about 16 to 23 inches from front to back. The basin of a bathroom sink is usually about 5 to 8 inches deep. 

Of course, besides sink measurements, you have to consider if your sink is stand-alone or built into a vanity. You also have to contend with whether or not you have to fit a sink into an existing opening. All of these little details play a part in finding a sink that is the best fit for your bathroom.

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A Pedestal Sink in the Bathroom

A pedestal sink adds a touch of charm to a bathroom, but not much storage or surface space. However, this is the very trait that makes this an excellent sink style for small bathrooms and powder rooms. 

A pedestal sink is roughly 22 to 24 inches wide and about 33 to 34 inches tall. The depth of the sink (from front to back) can vary but is usually about 18 to 20 inches. Some slimline pedestal sinks are closer to 16 inches wide and 15 inches from front to back. 

Corner pedestal sinks usually run about 15 inches along the wall. Additionally, they project out roughly 20 inches to the front-most part of the sink. These triangular sinks are an excellent option for bathrooms where space is at a premium. 

Pedestal sinks can be freestanding or also mount to the wall for extra support. 

A Wall-Mounted Bathroom Sink

A wall-mounted (or floating) sink is another great space-saving option, but it typically doesn’t offer much more than a basin. However, some styles feature floating vanities that provide a little surface space. 

You most often find these types of sinks in businesses and commercial settings. However, they’ve started popping up in homes as well. 

The average wall-mounted sink is roughly 20 inches from front to back and a little over 24 inches wide. Some larger models provide more surface area, reaching closer to 40 inches wide or more. 


An essential factor to keep in mind is this style of sink has no bottom. Therefore, you’ll see the pipes below the sink. 

Since the pipes would be visible, a wall-mount sink works best, aesthetically, with attractive pipes like polished chrome or copper. If you don’t like the idea of exposed pipes, you could opt for a wall-mounted vanity instead.

A Note About Installing a Wall-Mount Bathroom Sink

Wall-mounted sinks are typically quite heavy, weighing around 85 pounds depending on the material. Therefore it is critical to ensure you install it properly. If you don’t feel confident about your ability to do so, hire a professional for this one. 

If you have a wall-mount vanity, it will be even heavier. Wall-mount vanities can be anywhere from 120 to over 250 pounds for double models.

A wall-mount sink should sit no higher than a sink in a countertop. The highest point of the sink’s front edge should be no more than 34 inches from the floor. 

A Vanity Sink

A bathroom vanity offers a place to get ready, store items, and of course, use the sink. But, vanities can range in size from super-slim to downright massive. A standard bathroom vanity can be 24 inches, 30 inches, 36 inches, 48 inches, 60 inches, or 72 inches wide. In keeping with a comfortable sink height, most vanities stand about 32 to 36 inches tall. 

Typically, from front to back, a standard vanity is about 20 to 21 inches. However, if you need to go smaller, narrower options come closer to 18 inches. 

The space needed for your vanity sink depends highly on the size of your vanity and the type of sink. You can choose from under-mount sinks, drop-in sinks, and bowl or vessel sinks.

Undermount Bathroom Sinks

Undermount sinks install below the countertop, exposing the edge of the countertop around the sink. These types of sinks are super easy to clean since you don’t have to deal with any sink rim.

An undermount sink can come in various sizes and shapes, including round, rectangular, and oval. They can range from 16 to 24 inches wide, usually not going larger than 30 inches. From front to back, undermount sinks are about 12 to 18 inches deep, usually not exceeding 22 inches. 

Drop-In Bathroom Sinks

These sinks are usually the easiest to install since they literally drop into the countertop. The sink features a rolled edge that allows it to rest on top of the counter. Of course, this can make cleaning around the sink a bit tricky. 

The dimensions of drop-in sinks are similar to those of undermount sinks. Drop-in sinks can also come in various shapes. 

Vessel Sinks

These more modern and often decorative sinks sit on top of the counter. Vessel sinks usually are round and roughly 14 to 20 inches in diameter. 

These sinks tend to be more on the shallow side. This, and their raised edges, often make splashing water over the sides when you’re washing your face pretty common.


How Much Space Do You Need for Double Sinks?

If you share a bathroom with someone else, double sinks can be a lifesaver. Most commonly, you find double sinks paired up with a vanity or even double vanities. Having double wall-mount or pedestal sinks isn’t as common, although you can do that too.

Double sink vanities are typically between 60 to 72 inches in width. However, you can find some as small as 48 inches if space is limited. Single-sink vanities range in width from about 18 to 48 inches.

You can also opt for a double-bowl sink, which can range from 40 to 57 inches wide.  


When incorporating double sinks into your bathroom, consider the spacing between the sinks. It would be best to design the area with the assumption that both sinks will be used simultaneously. 

Typically, you see double sinks side-by-side. These sinks can be drop-in, be undermount, or vessel style sinks. There should be at least 30 to 36 inches of space between the center of the sinks.

In some bathrooms, there might not be enough space to place sinks side-by-side. Or, on the contrary, the bathroom is expansive and allows plenty of room to spread out. In these situations, you could opt for two single vanities and place them on opposite walls of the bathroom. 

Extra Considerations When Choosing Your Bathroom Sink

Sink size and style are essential, but they aren’t the only factors to consider when choosing a bathroom sink. You also should strongly consider your bathroom’s layout and who will use the space.

For example, if multiple family members use the bathroom regularly, storage is likely a must. Double sinks are also likely a big plus. Aim for the largest vanity you can to maximize your storage without overpowering the bathroom. 

Another factor to keep in mind is the interior bowl of the sink. It is usually about 1 ½ to 2 ½ inches smaller than the sink’s outer perimeter. 

Bathroom Sink Height and Spacing

In addition to some of the points already mentioned, think about the big picture when it comes to your bathroom sink. Typically the top of the sink rests about 34 inches from the floor, although this can fluctuate between 30 and 36 inches. 

The bathroom mirror is usually centered over the sink (or the midpoint of double sinks). Usually, you place the mirror about 11 to 12 inches above the sink.


Faucet Holes and Pipes

Obviously, a sink does you no good if it has no water. Therefore, proper faucet and pipe placement is critical. 

When you measure for your bathroom sink, make sure to do so based on your bathroom pipes. After all, unless you plan to reroute plumbing, this is where your sink has to go.

For your faucet, it needs to fit with the sink you choose. Most sinks have predrilled holes for either single-handled or double-handled faucets. 

If your sink only has one pre-drilled hole, you need to find a single-handled faucet. If your sink has three holes, you need a faucet with separate handles for hot and cold. Some single-handled faucets come with plates to cover the extra holes so that you can use them with three-hole sinks. 

For three-hole sinks with holes spaced 4 inches apart, you need a center-set faucet. If the holes are 8 to 16 inches apart, you need a widespread faucet. 

If your sink doesn’t have any holes, you need a faucet designed to mount on the wall or the countertop. These types of faucets usually work with vessel sinks, and some undermount sinks as well.

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Related Questions

What are some bathroom sink options in an extremely small space, like in a tiny house bathroom?

If even the smallest standard sink is too big for your space, you can go even tinier. Some sinks are barely big enough to wash both hands. Some tiny sinks are only about 10 to 12 inches wide and 8 to 10 inches from front to back. 

There are also specific sinks designed to go above the toilet tank. The water from the sink drains directly into the tank, making it a relatively efficient process. 

Can you use a kitchen sink in a bathroom? What’s the difference?

You can always use a kitchen sink in a bathroom, but you need to be aware of the differences. A kitchen sink is typically more of a workhorse than a bathroom sink, so function is king. Therefore, you likely won’t have as many design options as you would for in a bathroom. 

Plus, kitchen drains are usually slightly bigger, at 1 ½ inches compared to a bathroom’s 1 ¼-inch drain. This is because kitchen sinks typically need to handle more solids. 

You also need to make sure if you use a kitchen sink, you get the right faucet to go with it. Usually, a bathroom faucet won’t fit with a kitchen sink and vice versa. 

No matter what sink you ultimately choose, make sure to consider your measurements carefully before purchasing and installing your sink. Otherwise, you’ll just be sending a lot of time and money down the drain. 

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Stacy Randall

Stacy Randall is a wife, mother, and freelance writer from NOLA that has always had a love for DIY projects, home organization, and making spaces beautiful. Together with her husband, she has been spending the last several years lovingly renovating her grandparent’s former home, making it their own and learning a lot about life along the way.

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