When designing your bathroom, your bathroom mirror is a great opportunity to showcase personality and style. But picking the perfect piece often becomes an afterthought. While making sure that your wall color compliments your flooring and your fixtures enhance your vanity, selecting a mirror for your bathroom is just as important.

What size should your bathroom mirror be?

Whether you have a small vanity, a large vanity with dual basins, or two separate vanities with twin mirrors above, the size and position of your vanity matters. When your vanity mirror doesn’t blend with the space and the dynamics of the room, you’ll notice it. If it’s too small, you might not be able to use it in the way you want to. If it’s too large, it could dominate the space. If it’s positioned too high or too low, it also impacts functionality and aesthetics. This is why choosing the right mirror for your bathroom is so important.

When shopping for a mirror to mount above your vanity, the rule of thumb is 2 to 4 inches narrower than your vanity. For example, a 24-inch wide vanity would normally get a mirror that was 20 to 24 inches wide. Not only does this look right plain, it leaves room to frame your mirror and give it extra style!

The top measurement of the bathroom:

The top-to-bottom measurement of the bathroom mirror depends on a few factors: how tall the vanity is, whether there's a light fixture above it, and how high the ceiling is. If possible, center the mirror between the sink and the vanity lighting, leaving a few inches of clearance at the both top (beneath the light fixture) and bottom (above the faucet) of the mirror.

Standard Mirror Sizes:

Each type of mirror tends to have a common size range that you’ll find. Here are the most common mirror sizes for the different types of mirrors:

Wall Mirror – 24 inches by 34 inches

Interior Closet Door Mirror – 18 inches by 36 inches

Vanity Table Mirror – 28 inches by 14 inches to 33.5inches by 37.5inches

Dressing Table Mirror – 32-inches high x 16-inches wide

Shower Wall Mirror – 12-inches high x 24-inches wide

Wall Mounted Bathroom Vanity Mirrors  – 30 to 48 inches wide by 24 inches tall

4 Tips to select perfect bathroom mirror size:

1- Determining Width

he first thing that you’ll want to do in finding the appropriate width of the bathroom mirror is to measure the width of your vanity. Your bathroom mirror should ideally be wider than the sink, but slightly narrower than the width of the vanity or match its width for a balanced look.

2- Height of the Bathroom Mirror

For a well-balanced appearance, the height of the bathroom mirror should be proportional to the height of the vanity. There isn't a rule or recommendation that says you should have a mirror at a certain height. Some designers will recommend having a bathroom mirror that is at least ⅔ the height of your vanity (for example, a vanity with a height of 36' from floor to countertop with a 24' tall mirror minimum). Others might recommend a mirror that is tall enough to show your torso and at least 6' above your head while standing at your vanity.

3- Storage Frames

If you need a little extra shelf space—or just like the look of a framed mirror—the vanity mirror is a design opportunity that you can take advantage of. Whether it’s just a single shelf below the mirror or offset integrated shelving, it’s always a plus to have a place to keep your items handy or on display.

4- Styles and Shapes

Bathroom mirrors can come in an array of sizes, shapes, and features. In most bathrooms, a rectangular or round mirror is standard – however, decorative styles like arched mirrors, ovals, and even octagonal frames have become increasingly popular. 

Conclusion: When you are deciding on the perfect mirror size for your space, take your time. Think about what you like and what works best for your room and needs. Ultimately, there is no one-size-fits-all solution, and exploring different options is a good idea.