Whether you are performing the whole remodeling project or making a few changes in your compact powder rooms or guest rooms, nothing can convey the balanced and modern aesthetics of mounting the right size mirror. Suppose you have a small vanity like a 30-inch bathroom vanity.

In that case, you can find out what size is suitable for your small vanity since the vanity mirrors are focal points of any size bathroom that are beneficial for all your grooming processes. A normal day of person starts and ends by facing the mirror in the morning and at night, respectively. Along with the proper vanity, a beautiful mirror is crucial to enhancing the overall design of your bathrooms. 

At first, it seems like buying the right size mirror is an easy task and can be done quickly. But when you step into the market, after seeing a lot of options for mirrors, you need to consider different things before choosing one. Besides the color and style, the most important thing is the right mirror size for your bathroom. Mirrors are available in various sizes. All you need to do is figure out what size is suitable for your 30-inch vanity. 

In this article, you will find the details about some standard measurements as well as the other factors which are involved while buying the right size mirror for 30-inch vanity. 

What is the standard mirror size for 30-inch vanity?

The standard rule for hanging the mirror above 30-inch vanity or any size vanity defines that the mirror should be 2-4 inches smaller than the width of the vanity. By keeping this in mind, you can estimate the width or size of the mirror for any bathroom vanity. There should be 2 inches gap between the mirror width and vanity width on either side of the mirror. However, the standard rule for congested areas allows you to add one or two more inches in the mirror size to give a broader look to your small bathrooms. So the standard mirror size for 30-inch vanity is 26- to 28 inches. 

But in the design industry, there is no strict rule to define the size of anything or the mirror size for your vanity. The size can be changed to suit your requirements and the space that is available. The most crucial thing is to provide your areas a well-balanced and artistic appearance. For this reason, you need to focus on different things such as vanity dimensions, mirror shapes and styles, lighting fixtures type, and, most importantly, its functionality. 

What Size Mirror For 30 Inch Vanity

Consider the width of the 30-inch vanity.

To measure the width and size of the mirror, you need to start from the width of the vanity. Here we are talking about the 30-inch bathroom vanity, so here you know the vanity width. If you need clarification on the vanity width, measure that first.

The mirror size should be 2 inches less than the size of the vanity from both sides of the mirror. The mirror, wider than the vanity, must give an appropriate look. Keep it smaller than the vanity’s width to create a final gorgeous appearance. 

Think about the sink size of 30-inch vanity

The other thing is the sink size. The mirror should be bigger than the sink in size. Whether you have a broad and luxurious sink or the small sink, the mirror size will always be greater than that. If you choose the mirror narrower than the sink, you will have an unsymmetrical appearance. It will also affect the functionality of your mirror and the vanity. Imagine having a 30-inch vanity with a 16-18 inch mirror. It will always give an inaccurate appearance. Plus, you will lose the charm of your luxurious vanity. So, there is no point in having a mirror more diminutive than the sink’s width. 

30 inch Gray Single Bathroom Sink Vanity

Types of lighting fixtures for 30-inch vanity

Next, you need to consider what type of lighting fixture you want. You will get various styles of lighting fixtures from the market. And even you can arrange them according to your choice. These options are:

  • A lighting fixture bar with single or multiple bulbs
  • Sconces above the mirror
  • Sconces on either side of your mirror
  • A pendant light above your vanity 
  • Even a mirror with LED lights

The size of your mirror can vary according to your selected types of lighting. For larger vanities there, you can use a single bar with multiple bulbs or two or three wall-mounted sconces on the sides of a single or double mirror. 

Checkout Our Latest Guide: How to Install Bathroom Vanity

Lighting placement: over or beside the 30-inch vanity

For 30-inch vanity the mirror size will depend on the option of lighting you select and where you want to place it. When mounting the wall sconces and the lighting fixtures, you will get two options for lighting placement. For small-size vanities like 30-inch vanity, you can go for either a single bar fixture or the two sconces beside the mirror in tight areas. 

If you select a lighting bar, leave the space to hang over the mirror and leave at least 2-3 inches of gaps between the lighting fixture and the mirror top. In contrast, for wall-mounted sconces, you need to hang them on either side of the mirror. In that case, you need to subtract one or two inches from the standard width of your mirror for 30-inch vanity. 

Define the height of the mirror over the 30-inch vanity

Besides the lighting fixtures, the mirror’s height can vary according to the size of other things. Regardless of the style and shape of the mirror, to measure the right size for your mirror, focus on the height of other things.

User height

Start with the user height that is going to utilize the vanity. The primary purpose is to provide the comfortability to the user. If you are mounting the mirror in the children’s bathroom, you need to place it at their eye level. If you are hanging the mirror in your bath areas, then your height will play an essential role in deciding the size or height of the mirror. To make functional a 30-inch vanity for multiple users, consider the height of all users. 

Ceiling height

The second thing is to measure the height of your ceiling. If you have more vast room with more distance between the floor and the roof, then hanging the large mirror is no issue. If your ceiling is very low, try to mount the mirror, which is smaller in size. There should be a 4-5 inches gap between the mirror’s edge and ceiling. 

Vanity height

Similar to the mirror’s width, the mirror height also depends on the vanity’s size. The mirror above the bathroom vanity shouldn’t be placed so long that the sink faucet or the backsplash will encounter the mirror bottom. To measure the mirror’s ideal height, there should be 2-10 inches of space between the sink and the edge of the mirror. 


Does the vanity light must match the mirror in terms of size?

The standard rule for hanging the lighting fixtures over the vanity top is 75% less than the width of the vanity mirror. It should not equal to or be longer than the mirror’s width. However, you can hang multi-light fixtures for double bathroom vanities to bring more brightness and balanced appeal. 


So, if you are considering what size mirror would be perfect for 30 inch-bathroom vanity, you also need to focus on another important thing besides following the standard rule. According to the rule of thumb, the mirror size for 30-inch vanity should be 26 inches to 28 inches wide. However, according to the rule, a mirror should be 2 inches smaller than the width of the vanity countertop but for smaller vanities like a 30-inch bathroom vanity, you can add leave a one-inch gap from each side of the mirror.