Monday, May 20, 2019

Round Brush Size Chart

You can get a salon blowout at home with the right sized round brush and some practice. Round brushes are typically made with a metal or a ceramic coated barrel that heats up when used with a blow dryer. It works much like a curling wand.

Round brush size chart

  1. 17mm or 1/2 to 3/4 = very short hair, ear length
  2. 23mm or 3/4 to 1 = short hair, above chin
  3. 32mm or 1 to 1.5 = shoulder length
  4. 43mm or 1.5 to 2 = beyond shoulder
How to choose hair brush size
Round Brush Size Chart
A round brush is a fantastic tool to help with taming frizz and delivers the desired amount of bounce to your hair. However you should know that if you have fine or even normal hair using a round brush with a metal or ceramic barrel can cause severe heat damage if your hair already has weak ends.

What you can do instead is trying something a little gentler like using a mixed bristle or a natural round boar brush. Our handy-dandy chart above was created with the help of avatarmaker.

How to choose hair brush size

There are there tons of bristle options and sizes when it comes to round brushes. The most asked question is what size is going to work best for me. There are two main points to consider when choosing the size of your round brush. First is the length of your hair and second is the size of the curl or wave you want.

Round brush for short hair

For creating that extra volume and body in your hair round brushes are ideal. A round brush is what you want when blow drying your hair. The smaller the brush the tighter the curl it creates. If your hair is about chin length or shorter then a small brush like a 17mm to 23mm will work. This is also a great size for styling bangs.

Round brush for long hair

Larger brushes with bigger barrels are great for straightening and creating waves. For hair that is shoulder length a 32mm brush is an ideal size. You can also use a 43mm. Some prefer a slightly larger brush. It just depends on your personal preference. If you are in doubt go up in size because using a brush that is too small in size causes your hair to get stuck in the bristles. The one exception is when you are styling bangs. This is case where a small brush is going to be ideal.

There are brushes that are larger than 43mm and if you have hair that is longer than shoulder length a brush with a 43mm or larger can be your go to tool for creating beautiful voluminous hair.

There are a few hair brushes that come with an extra long barrel. These brushes are advantageous because they can dry your hair up to 25% faster. The longer barrel lets you work more efficiently thus covering more hair with each brush. The one brush that comes to mind is the Olivia Garden ceramic
+ ion extra long barrel speed XL.

Olivia Garden brush
Extra Long Barrel Brush

Round brush size diagram

Use our brush guide above to help you choose the right size brush for your style of hair. There are many more sizes than mentioned in this article. Sizes mentioned here are to be used as a general guide and is not a hard and fast rule. Using the right size brush is very important due to you will become more efficient and will spend less time in front of the mirror.

Round brush tips

If you have frizzy hair then you may want to consider using a round boar brush. Boar is excellent at gripping your hair and getting more tension thus creating a sleeker style. Plus boar is great at spreading your natural hair oil down the hair shaft to the ends where your hair most likely needs it the most.

Sometimes is best to brush your hair in sections making sure to cover each section well before moving on to the next section. This of course takes more time but in the long run you will have naturally shinny hair.

Another big consideration when shopping for a brush is to make sure you get a brush with enough bristles. If the brush does not have enough bristles then your hair can get tangled in the brush. If the tangle is too bad you might end up having to cut your hair.

Also, if you are planning to get a mixed brush, one with nylon and boar make sure the tips of the nylon are smooth or have a round ball on the ends. Otherwise it could feel jagged and unpleasant when using. In addition, it could even pull out your hair, cause split-ends and thus damage your hair.

Look for a professional round brush that is intended for use with a blow dryer. A good round boar brush with a fine bristle will smooth your hair properly if used with a blow dryer. It's the ideal brush for creating styles that maximum volume.

Round brushes create curls and waves by wrapping up your hair around the brush and then when heat from the blow dryer is applied and then your hair cools down the curl or wave is created. When straightening hair the bristles grab your hair and tension is created thus holding your hair straight because your hair is wrapped around the brush. A the same time heat is applied from your hair dryer. When your hair is allowed to cool the straightness is then set.

Finally, look for a brush with a good strong handle especially if you have long hair. The longer your hair the more tension you will likely create and thus will put more stress on the handle. A wooden handle is superb and most likely ideal. Beware that some two piece plastic handles are prone to break after heavy use.


I hope this article was of help. Please comment. I would be interested to know what size brush works best for you and why. I also would be interested to hear about the different brands you are using.

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