Mandy PhillipsSelecting the perfect bathroom sink is more science than art, involving precise standard bathroom sink dimensions to enhance both functionality and style.
Cut through the clutter of choices with our comprehensive guide, designed to make understanding standard bathroom sink sizes straightforward and stress-free.
Learn the essentials of how to measure a bathroom sink, and step confidently towards making an informed decision.
What are Standard Bathroom Sink Sizes and Dimensions?
There is no such thing as a standard bathroom sink size and dimension, but there are a few typical sizes for some of the most common sink shapes.
Round and oval bathroom sinks will generally run between 15 to 20 inches in diameter. Rectangular sinks are usually 19 to 24 inches wide and 16 to 23 inches in length.
Most round and oval sinks are deeper than rectangular ones, but as a general rule, bathroom sinks should have a water depth of at least 5 to 8 inches.
Bathroom Sink Size Guide
Since your individual needs and the needs of those who will be sharing the bathroom sink with you may differ, size dimensions must correspond to its intended purposes.
Let’s take a look at different types of bathroom sinks along with their sizes and dimensions.
Single Bathroom Sink Size
If you are installing a single bathroom sink, you need to have at least a 30-inch vanity. This will give you some counter space to use.
For example, if you get a sink that is 19 to 24 inches in diameter, you still get around three to five inches of space for your essentials on both sides.
Double Bathroom Sink Size
A double bathroom sink is a popular choice for a master bathroom since it allows you and your partner to use individual sinks.
When planning for a double sink bathroom, there are two considerations.
First, there should be enough distance between the sinks.
A space of at least 12 inches between each sink will give you enough room to get ready in the morning without bumping elbows with one another.
Second, the bathroom vanity should be able to hold both sinks and still have enough counter space.
A 19-inch diameter round sink with a standard height of 8 inches is popular for this style.
Both sink and counter measurements should be accounted for as each person should have at least 3 to 5 inches of space.
Aim for a vanity that is at least 60 inches or 80 inches, if the space permits.
Wall-Mount Sink Size
Since a wall-mounted sink is one that hangs off the wall in your bathroom, it is a great choice if you have a small space, a minimalist home, or if you just need a deeper sink.
A wall-mounted sink is generally around 22 to 24 inches wide and 16 to 23 inches long.
Since there is no counter, a wall-mount sink will allow you to have a wider and deeper basin.
Most sinks in this style are 6 to 8 inches deep, but since there is no cabinet underneath, you can make it deep enough to do laundry or bathe your pets.
A wall-mount sink will give you more floor space, but little to no counter space.
When measuring for a wall-mount sink, you may have to allow some space for a separate counter or storage.
Vessel Sink Size
Vessel sinks are some of the most sophisticated and stylish sinks.
They feel modern, as they sit on top of the bathroom counter, and elegant at the same time since there are no exposed plumbing features.
Most vessel sinks are 14 to 20 inches in diameter.
You can install a vessel sink that is longer and wider, but their water depth is most likely to be 4 to 7 inches.
This means that they are enough to wash your hands and face in, but if you want to use your sink to do a little bit of laundry, you need to reconsider getting a vessel sink.
Pedestal Sink Size
A pedestal sink is a freestanding sink with a column underneath that provides support and hides all the plumbing lines.
The dimensions of your pedestal sink will depend on the design and your requirements.
Typically, they are 19 to 24 inches in width and 22 to 24 inches in length.
Since a pedestal sink is a standalone sink, it works very well for a bathroom with limited space, but it does not include a counter or other storage areas.
This can be solved by choosing a pedestal sink with a small rim around it where you can place some of your bathroom essentials.
Undermount Sink Size
Undermount sinks are installed under a countertop typically made of concrete, granite, or marble.
They are customized by cutting a hole into the countertop.
This hole must correspond to the size of the sink for a clean and perfect fit.
The dimensions of undermount sinks typically run from 16 to 24 inches wide and 12 to 18 inches deep.
These measurements are for the entire sink, so keep in mind that the interior bowl will be 1.5 to 2.5 inches smaller.
Because the sink is installed into the countertop, it frees up all of the counter space for you to use.
It also makes both the counter and sink easy to clean.
Drop-In Sink Size
Drop-in sinks, also called self-rimming sinks, are installed above the countertop and are held in place by their lips.
They are some of the most popular bathroom sink styles because they are very easy to install.
For bathroom remodels, they can be replaced without changing your countertop, and they work well with any type of material.
Because of their popularity, there are many drop-in sink shapes available on the market, but the popular choices are the rectangular, circular, and oval drop-in sinks.
Rectangular drop-in sinks are typically 18 inches wide, 24 inches long, and 5 inches deep.
Circular and oval drop-in sinks are usually 8 inches in diameter and have a water depth of 8 inches.
Corner Sink Size
Corner bathroom sinks are often used in tight spaces or for powder room corners.
They are some of the most space-saving sinks because they often don’t require a countertop, and they fit snugly into the corner of the room.
If they are installed on a corner vanity or a corner sink base, typical oval sink dimensions will work.
If you want a triangular or a rounder triangular sink, keep in mind that they are measured differently than oval or rectangular sinks.
Triangular or rounded triangular sinks are usually 33 by 22 inches or 38 by 22 inches, depending on your preference and the size of your cabinet base.
How to Measure a Bathroom Sink and Surroundings
How a bathroom sink size is measured will depend on the type of sink you want to install.
If you are buying a round sink, the dimensions that you need are the circumference and the length.
For rectangular and square sinks, measure the width (side to side) and length (front to back).
To measure the water depth, start from the deepest part of the sink to the overflow.
When replacing an old sink, removing the old sink before taking the measurements will make it easier and more accurate.
When measuring, take note of the surrounding space.
If you are measuring for a wall-mount sink, see if the structure behind it is sturdy enough to support the weight of the sink.
When installing an undermount sink, make sure you have enough space for the type and size of the sink that you want.
Do this by measuring the width and length of your cabinet or vanity.
This will let you know how large your sink can be.
Leave at least 1 to 2 inches extra to allow more room to maneuver while installing.
How to Pick the Right Bathroom Sink Size
Now that you have the information to help you make an appropriate selection, it is time to pick the right bathroom size for you.
There are two things to consider here: your space and your needs.
First, think about your space.
Are you building a new bathroom or remodeling an existing one?
If it is a new build, the dimensions of your bathroom sink will help other details fall into place.
If you are replacing an existing sink, you need to match it with the counter dimensions and the current plumbing setup.
Most bathroom sinks have one or three holes. This can make a difference in terms of spacing.
Make sure your faucet choice corresponds with your sink’s ready-made holes.
Make sure that your bathroom has enough interior space to accommodate your preferred sink type.
If you have more space, there is more room for a sink that requires a larger countertop.
For smaller bathrooms, consider sinks that will allow you to either maximize your counter space or will not require one at all.
Second, think about what you need your bathroom sink for.
Do you only need it to wash your hands and face?
Or, do you need a multipurpose sink for washing your hair and doing laundry?
Your needs will determine the size and length of the bathroom sink that is perfect for you.
You will be using your sink often and for a long time so make sure you give priority to your comfort.
Wrapping Up
Your bathroom sink is a long term investment.
Whether you are choosing the right bathroom sink size for your new bathroom or remodeling an existing one, your personal preference, space limitations, and usage will all play a major role.
Choose a bathroom sink size and style that is most comfortable for you and will best fit your daily use.
