Which Flat Iron is Best for Thin Hair?

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Women everywhere love the look of what using a flat iron can do to their hair. This tool is perfect for making effortless-looking hairstyles. Women with fine hair, however, sometimes feel like they won’t be able to use a flat iron. If you have thin hair and are looking for a flat iron, this guide will help you find the perfect one.

Top 5 Straighteners for Thin Hair

ModelTypeSizeHeat TimeOur Rating
BIO IonicHeats up almost instantlyCeramic1"30 sec
Karmin G3Great for all hair typesTourmaline1"30 sec
CHI OriginalPerfect for reducing frizzTourmaline1"2 min

#1. BIO IONIC Onepass


  • Straighten hair in half the time compared to traditional straighteners.
  • Silicone strips prevents pulling your hair during use.


  • Due to the high heat, can sometimes cause burnt smell.
  • Has trouble straightening very thick wavy hair.

No matter the texture of your thin hair, this flat iron will do a great job getting it straight. This iron works especially well for women with flat hair and due to the high temperature and one-pass technology, you will be able to get your hair straight quickly without a lot of hassle.

This flat iron has a nine-foot cord that makes it perfect to use if you need to help someone else with their hair. Friends or roommates can assist each other with their hair with no fear of being burned.

Users online love how fast this iron works, though some do complain about a scorching or burning smell. You can diminish this by choosing the correct temperature when straightening your hair.

#2. Karmin G3 Salon Professional Ceramic


  • Plates heat up in under thirty seconds.
  • Temperature settings for all hair types.


  • The outer case could be more durable.
  • Struggles with really thick hair.

This flat iron has a low enough setting that won’t scorch fine hair. Other flat irons with only high settings are prone to damage fine hair.

The Karmin Flat Iron heats up really quickly on low settings and will work with just one pass if you have thinnish hair. This makes getting ready in the morning or before an event a breeze.

No matter what users need this flat iron for – to straighten hair or to add some curl – it does a great job. That being said, dropping it will crack it quickly as the plastic is a little cheap.

#3. BaBylissPRO Keratin


  • Titanium plates are infused with keratin.
  • Consistent high heat seals keratin into your hair.


  • Plates don’t close all the way, making it difficult to grip the hair.
  • Keratin changes the texture of your hair.

For women looking to keep their hair straight for a long time, this is the perfect flat iron. The keratin treatment keeps hair shiny and straight for days after use, even if you like to style your hair and live in a humid area.

Women in humid weather won’t have to worry about their hair becoming frizzy. This flat iron does a great job at sealing straight hair so that it won’t be affected by the humidity.

Some buyers online had problems with units not turning on or holding heat, but users who were able to use this flat iron as expected loved the results. Faulty units can always be replaced by the manufacturer.

#4. CHI Fire Red Tourmaline Ceramic


  • Even heat distribution keeps hair from burning.
  • Perfect for a number of styles, not just straightening your hair.


  • Doesn’t work great on the first pass, requiring more time to get hair straight.
  • Leaves hair very dry and easy to damage after use.

One of the best perks of this flat iron is how quickly it heats up, making touching up your hair during the day fast. This is especially useful during humid days, as your hair will tend to fall flat.

Users have commented that this flat iron works great on thin hair as it doesn’t have to fight through with thick strands. If your hair is fine and thin then this flat iron is a great pick for you.

Mixed reviews online about this flat iron focus on how hair feels after using it – especially that hair can be frizzy. Using a product with this CHI will keep hair from being damaged.

#5. Infiniti Pro by Conair Tourmaline Ceramic


  • Ceramic heaters keep the temperature stable.
  • Heats up in thirty seconds.


  • Tends to pull hair.
  • Doesn’t always close completely, leaving a gap hair can slide out.

This is a professional straightener that is perfect for home use. It emits negative ions to combat frizziness and other issues.

The ceramic heaters keep hot spots that can damage your hair from forming. This way you don’t have to worry about accidentally leaving the flat iron in one place for too long.

Users love the control that they have over their hair when they use this flat iron! It’s great for many styles and can straighten even the thickest and curliest hair that you have.

Tips for Choosing a Hair Straightener which Works with Thin Hair

There are some tips that can help you pick the best straightener for your thin hair. Follow these and you’re sure to buy one that will work great for all of your needs:

  1. Flat irons come with different plate sizes, but women with thin hair need to buy one that has small plates, around 1″-1.5″. Larger plates are perfect for women with thick hair, but using one can actually damage it.
  1. Always check the material that the plates on the flat iron are made out of. There are a lot of materials that can be used, but ceramic or titanium plates are the best for use on thinner hair. They won’t scorch your hair and cause breakage, and because they heat evenly you won’t have to worry about hot spots.
  1. A low-temperature setting is imperative if you have fine hair. The last thing you want to do is burn your hair with a high temperature. Only buy a flat iron that has an adjustable temperature that can be made low enough.

How to Use a Flat Iron on Fine Hair Types

Using a product to help you get the lift that you need at your roots. Holding your hair out from your head, spray it on your roots and then blow-dry that area. Always make sure that your hair is as close to dry as possible when applying the product to roots so that it is not diluted by water left in your hair.

When ready to straighten, make sure that you are holding your hair out from your scalp with your wrist bent slightly. Slide the straightener down your hair, keeping your wrist bend to give some bend and body to your hair. If you don’t bend your wrist, your hair will be straight, but won’t have any movement and will look flat and dead.

Making sure to keep lift at your roots will make it seem like you have more hair than you actually do. When you finish straightening your hair make sure to apply a spritz of hairspray to the roots. You don’t want to spray it all over your hair and weigh it down, but applying some at the roots will keep that area voluminous. A fine mist over your whole head when you are done styling is fine, but make sure you aren’t applying it too heavily.

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Best Flat Iron for Fine Hair
  • BIO IONIC Onepass
  • Karmin G3
  • BaBylissPRO Keratin
  • CHI Fire Red
  • Infiniti Pro


Do you have fine hair and struggle to find a straightener that works 100%? Our guide reviews the top flat irons for thin hair so you’ll look great.

My name is Ellie and I love all the latest beauty, fashion and hair trends. My blog covers anything from social media, product reviews & how-to guides. If you're anything like me and struggle for spare time hopefully you'll find my tips save you time and money.

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