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Round Brush Sizes, What Size Should I Use



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  • Round brushes can be thermal or non-thermal. Thermal means the barrel has a hollow or full metal core designed specifically to conduct heat to the hair.  The danger with thermal brushes is that too much heat cause heat damage.  When used correctly, a thermal round brush can speed up drying time and lock in tighter texture.

  • Round brushes should not be used for every type of hair.  Ideally, a round brush works best with straight or slightly wavy hair and is less effective with curly or kinky hair. 

  • Round brushes work well for building volume for thin or fine hair.
  • Sometimes multiple round brush sizes are needed for a desired hairstyle. You may need a large or extra large round brush for the crown or top section of your hair with medium or smaller round brushes for the perimeter of your hairstyle.

  • Whenever possible buy the best brush you can afford with the highest quality materials.  100% boar bristle is kindest to the hair
  • Avoid brushes with sharp bristles that can slice through delicate strands of hair or bristles with hard round ball tips.  The ball tips can snag your hair causing damage or breakage.

  • If you get your hair caught in a round brush remember not to panic.  Immediately call for assistance and use the long tail of a comb to carefully unwind any captured strands.  Do not try to untangle it yourself if possible.
  • Remember when you buy a new brush the bristles are often stiff. It’s not a bad idea for you to bring your new brush into your Professional Hair Stylist and see if he/she will use it to help you break it in.

Barrel Sizes:

Your desired finished hairstyle and the length of your hair directly determine which size brush to use.  The smaller the head of the brush, the tighter the resulting curls or texture that will be created. The larger the barrel, the looser the hairstyle and texture.  Think waves and curves rather than tight curls.

  • Do you have short hair and want to create volume? If so then I would recommend you purchase a more open bristle round brush with a 1 ½” - 1 ¼” barrel.
  • For shorter hair that you would like lift and curl consider a brush with a ¾” - 1 ¼” barrel
  • If you have long hair and want lift and a little curl then I recommend a large 2” barrel
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Cricket Technique #300 Tourmaline Thermal Round Brush - 3/4"
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