Choosing the right vanity size is one of the most important decisions in bathroom design.

A vanity that’s too big can make the room feel cramped. Too small, and you lose valuable storage.

Here’s how professionals approach vanity sizing.

Standard Bathroom Vanity Sizes

These are the most common vanity widths used in modern bathrooms:

36 inches is the most popular vanity size, offering the best balance of storage and space.

How to Measure Your Bathroom

Before buying a vanity, measure:

• Wall width
  
  

• Plumbing location
  
  

• Door swing clearance
  
  

• Walkway space
  
  

Designers usually recommend at least 30 inches of clearance in front of the vanity.

Single vs Double Sink Vanities

Single sink vanities are best for:

• Small bathrooms
  
  

• Guest bathrooms
  
  

• Powder rooms
  
  

Double vanities are ideal for:

• Master bathrooms
  
  

• Shared bathrooms
  
  

• Families
  
  

Pro Designer Tip

Always plan your vanity before choosing mirrors and lighting.
The vanity usually determines the entire bathroom layout.