Choosing the Right 25mm Curling Iron: Recommendations for Defined Curls

By Joybuy Product Recommendation Officer, 28 July 2026

Searching for that classic, bouncy curl that holds its shape all day? For many, a 25mm curling iron is the key to achieving this look. The diameter is ideal for creating defined curls that appear natural, without being too tight or too loose. But with so many options on the market, the choice can be overwhelming.

This guide is designed to help you. We'll highlight a few popular models based on their specifications and provide practical tips. This way, you can find a curling iron that suits your hair, needs, and budget.

What to Look for in a 25mm Curling Iron

Before we dive into the products, here are a few key factors to consider that will help you make your choice.

1. Barrel Material: The Importance of a Ceramic Coating

A ceramic curling iron is a popular choice, and for good reason. Ceramic is known for its ability to distribute heat evenly across the surface of the barrel. This helps prevent "hot spots," which can damage the hair. A smooth ceramic coating also ensures your hair glides effortlessly around the iron, reducing the chance of snagging and pulling. Some models feature a quartz-ceramic coating, which manufacturers claim provides an extra-smooth finish.

2. Temperature Settings: Control for Your Hair Type

Not every hair type requires the same amount of heat. A curling iron with adjustable temperature settings gives you the control to tailor the heat to your hair.

• Fine, colour-treated, or damaged hair: A lower temperature (around 150°C - 170°C) is often sufficient and minimises the risk of damage.
• Normal hair: A medium temperature (around 170°C - 190°C) typically works well.
• Thick or coarse hair: This hair type sometimes needs a higher temperature (up to 210°C) to properly form and set the curl.

Always start on a lower setting and only increase the temperature if necessary.

3. Extra Features: Convenient for Ease of Use

Pay attention to details that make styling easier. For example, a longer barrel is ideal for a curling iron for long hair, as you can wrap more hair in one go. A swivel cord prevents the cable from getting tangled, and an automatic shut-off function provides extra safety if you accidentally leave the iron on.

Popular 25mm Curling Iron Choices

Below is a selection of models that stand out for their specifications and features.

Babyliss C451E Curling Tong 25mm

Why This Model Stands Out This Babyliss 25mm curling iron is designed with ease of use in mind, especially for those with longer hair. The extended barrel provides more space to wrap long sections, and the quartz-ceramic coating ensures a smooth styling experience.

Pros

• Extended barrel: Convenient for styling medium to long hair.
• Quartz-ceramic coating: Provides a smooth surface and even heat distribution.
• 6 digital temperature settings: Adjustable from 160°C to 210°C, suitable for various hair types.

Who Is It For? This model is a great option for those with medium to long hair who are looking for a curling iron with precise, digital temperature control for consistent styling.

Babyliss 25mm Curling Iron C325E

Why This Model Stands Out The Babyliss C325E is a functional and accessible curling iron. With 10 temperature settings, it offers a lot of flexibility, especially in the lower temperature range. This makes it an interesting choice for people with finer or colour-treated hair.

Pros

• 10 temperature settings: A wide range from 110°C to 180°C via a convenient dial.
• Ceramic coating: For even heat distribution.
• Integrated stand: Allows you to safely set down the hot iron during styling.

Who Is It For? A suitable choice for beginners or for those seeking a reliable curling iron with plenty of options in the lower temperature zones, ideal for finer hair.

ghd Chronos Curve Grand Tong Professional Hair Curling Iron

Why This Model Stands Out This professional curling iron from ghd focuses on performance and simplicity. Instead of adjustable temperatures, this model operates at a fixed, optimised styling temperature of 185°C. The manufacturer claims their 'Curl-Responsive Technology' ensures fast styling and a glossy result.

Pros

• Fixed styling temperature of 185°C: No guesswork; the iron operates at a temperature considered optimal by the manufacturer.
• Fast heat-up time: According to ghd, the iron is ready to use in 30 seconds.
• Automatic shut-off function: The iron turns itself off after a period of inactivity.

Who Is It For? For the user who wants to invest in a premium tool and prefers the ease of use of a fixed, optimised temperature for fast and consistent results.

Haven't Found What You're Looking For?

The 25mm curling iron is a versatile tool, but perhaps a different diameter or another type of styler would better suit your needs. For a broader overview of styling tools for curls, from wavers to automatic curlers, you can explore further.

See more options in our Curling Hair Style Tools category

Frequently Asked Questions about the 25mm Curling Iron

How do you create curls with a 25mm curling iron?

For great results when creating curls with a curling iron, you can follow these steps:

1. Preparation: Make sure your hair is completely dry and combed through. Use a heat protectant spray.
2. Sectioning: Divide your hair into sections. Smaller sections create tighter curls, while larger sections result in a looser wave.
3. Curling: Clamp a section of hair at the end and wrap it around the hot barrel. Hold for 5-10 seconds, depending on your hair type.
4. Cooling: Gently release the curl from the iron and let it cool in your hand or pinned up. This helps the curl last longer.
5. Finishing: Continue until all hair is curled. Gently run your fingers through them for a natural look and use a light-hold hairspray if desired.

What temperature should I use?

This depends on your hair type. A general guideline is:

• Fine or damaged hair: 150°C – 170°C
• Normal hair: 170°C – 190°C
• Thick or coarse hair: 190°C – 210°C

It is always advisable to start with a lower temperature and only increase it if you don't achieve the desired result.

What is the advantage of a ceramic curling iron?

A ceramic curling iron helps to distribute heat evenly. This reduces the risk of 'hot spots' (areas that are much hotter than the rest), which can damage the hair. Furthermore, the smooth surface ensures that the hair glides easily and smoothly along the barrel, making styling more comfortable.