French nails might look simple but any nail technician who has tried to create ten perfectly matching smile lines knows otherwise. 

One side is higher. One smile is deeper. The next is thicker. You perfect four nails… and then the thumb has other ideas.

The secret to mastering French isn’t having an unbelievably steady hand.

It’s understanding product control, brush choice, angle, pressure and positioning.

And there isn’t only one way to create a French.

At Katie Barnes, we have several nail art brushes that can be used to create different styles and techniques, from a classic painted French to ultra fine micro French details.

Let’s start with one of our favourites: the Katie Barnes French 08 Brush.

How to create French nails with the Katie Barnes French 08 Brush

The French 08 is designed to make creating a clean, controlled smile line easier.

Rather than trying to draw your entire French freehand with a liner, you can use the shape of the brush to help create and refine the smile.

Here’s how.

Step 1: Prepare your base

Complete your nail preparation and apply your chosen base colour according to the manufacturer’s instructions.

Make sure the surface you’re working on is smooth.

Any lumps or uneven areas underneath your French can make achieving a crisp smile line more difficult.

Cure your base colour as required.

Step 2: Load your French 08 Brush

Take your Katie Barnes French 08 Brush and prepare it with the appropriate product for your technique. Ensure the product is highly pigmented and not too viscous. 

You don’t want the brush dripping with product.

Too much product in the bristles can make it harder to achieve a clean, crisp edge.

Keep your product controlled.

Step 3: Create your smile line

Now use the shape of your French 08 to create your smile line.

Hold your brush at an angle and "stamp" in your smile line, then slowly pull to the free edge. Follow this video tutorial.

Work from one side of the nail towards the centre, then repeat from the opposite side.

This allows you to assess the symmetry as you work rather than trying to create the entire smile in one movement.

Don't pull, paint or drag your product.

Step 4: Change your brush angle

This is one of our favourite French tips.

Don’t keep your brush at exactly the same angle for the entire nail.

If you want a deeper smile line, adjust the angle of your French 08 as you work towards the sides.

Trying to push the brush straight into every area can make it harder to achieve those beautiful deep corners.

Move the brush and the client’s finger until you have the angle you need.

Step 5: Check your centre point

Before curing, look at the French from directly above.

Is the centre of your smile actually in the centre of the nail?

Are both sides approximately the same height?

Is the thickness consistent?

Don’t stare at one side for so long that you lose sight of the overall design.

Step 6: Refine before curing

This is your opportunity to perfect the smile.

Make small adjustments rather than endlessly reworking the entire French.

If one side is slightly higher, correct that side.

If your centre needs adjusting, refine the centre.

Don’t keep touching areas that already look good.

Sometimes knowing when to stop is the secret to cleaner nail art.

Step 7: Cure

Once you’re happy with the placement and symmetry, cure according to your gel manufacturer’s instructions.

Then complete the nail using your chosen finishing system.

And that’s your French. 🤍

But the French 08 isn’t the only way to create one.

Different Brushes, Different French Techniques

The best brush depends on the style of French you’re trying to achieve and the technique you personally find easiest.

This is why the Katie Barnes nail art brush collection contains different lengths and shapes.

French 08 Brush - Classic French

If you struggle with getting a crisp, symmetrical smile line, start here.

The Katie Barnes French 08 Brush is specifically designed for French application and refinement.

It’s ideal for:

• Classic French
• Crisp smile lines
• Deeper French designs
• Refining uneven edges
• Creating consistency across a full set

If you’ve always tried to paint your French using a standard gel brush, switching to a specialist French brush can completely change how you approach the technique.

Short Liner 01 – Precision & Micro French

The Katie Barnes Short Liner 01 gives you direct control for shorter lines and detailed work.

It’s brilliant when you want to manually draw and perfect smaller sections of your smile line.

Try the 01 for:

• Micro French
• Short nails
• Detailed smile line corrections
• Fine corner work
• Small French details
• Nail art French variations

Because the bristles are shorter, your movement translates more directly to the brush.

Long Liner 02 – Flowing Smile Lines

For longer, smoother movements, reach for the Katie Barnes Long Liner 02.

Longer bristles can help create a flowing line because you aren’t trying to construct the smile using lots of tiny strokes.

Use the 02 for:

• Freehand French
• Longer smile lines
• Deep French
• Curved designs
• Flowing French outlines

Let the length of the brush work for you.

Long Striper 11 - Long, Fine French Details

 

The Katie Barnes Long Striper 11 features 20mm bristles, giving you a beautiful balance of flexibility and control.

Long striper brushes are fantastic for creating smooth, continuous lines.

Try the 11 for:

• Fine French outlines
• Deep smile lines
• Long sweeping curves
• Double French
• Reverse French details
• Graphic French designs

Rather than trying to control every millimetre of the brush tip, allow the length of the bristles to guide your movement.

Ultra Long Striper 12 – Maximum Flow

Want an even longer continuous line?

The Katie Barnes Ultra Long Striper 12 gives you maximum length for sweeping line work.

It’s ideal for:

• Long flowing French outlines
• Extra deep smile lines
• Double French
• Abstract French
• Extended curved lines
• Detailed French nail art

Long brushes can initially look intimidating, but once you understand how to control them, they can actually make long lines feel easier.

Don’t try to use an ultra long striper like a tiny detail brush.

Load it correctly, stabilise your hand and allow the bristles to flow.

Brush 10 – Another Way to Create Your French

The Katie Barnes 10 Brush gives you another option for creating and refining French designs.

Different nail technicians naturally prefer different movements.

Some love creating their French using the dedicated shape of the 08.

Others prefer drawing their smile using a liner.

And some prefer using a specialist brush to manipulate and perfect the product.

The important thing isn’t forcing yourself to use the same method as somebody else.

It’s finding the brush and technique that gives you the greatest control and consistency.

French Nail Troubleshooting

Your French doesn’t need more staring.

It needs troubleshooting. 

If something repeatedly goes wrong, work out why.

Why are my French smile lines uneven?

Start by checking your centre point.

If your centre is off, the entire French can look asymmetrical even when each individual side is beautifully painted.

Create your centre reference and compare both sides before curing.

Also look at the nail itself.

Don’t automatically use the client’s finger as your visual reference because fingers and nails aren’t always perfectly straight.

Work according to the nail you’re actually painting.

Why is one side of my French higher?

This is often down to hand and client positioning.

If one side is easy to access and you’re struggling to reach the other, don’t twist your wrist into an awkward position.

Move the client’s finger.

Reposition the nail so you can approach both sides comfortably.

Why can’t I get a deep smile line?

Look at your brush angle.

This is particularly important when using the French 08.

If you’re trying to approach every part of the French from exactly the same angle, getting into the deeper side areas can become difficult.

Adjust the angle of your brush and reposition the finger.

Sometimes the difference between a shallow French and a beautifully deep smile is simply your approach angle.

Why does my French look thick and bulky?

Check how much product you’re applying.

French doesn’t need to mean a huge layer of white gel sitting on the free edge.

Keep your layers controlled.

If you’re repeatedly adding more product to correct the smile line, you can quickly create unnecessary thickness.

Sometimes it’s better to refine what you already have rather than adding more.

Why does my French gel look patchy?

Your product may not be pigmented enough for the design you’re trying to create.

If your French colour is extremely translucent, you may need multiple coats to achieve opacity.

Multiple thick coats can then affect the finished result.

Use an appropriately pigmented product and apply controlled layers.

Your brush can’t compensate for a product that isn’t suitable for the technique.

Why are my micro French lines too thick?

Look at three things:

Product. Pressure. Brush.

Don’t overload your brush.

Use very light pressure.

And choose a suitable precision brush such as the Short Liner 01.

Remember: when you press a brush against the nail, the bristles spread.

More pressure = a wider line.

Why are my French lines wobbly?

Stabilise your painting hand.

Don’t try to create precision nail art with your entire hand hovering in the air.

Create an appropriate contact point, relax your grip and reposition the client’s finger so you can comfortably pull the line towards yourself where possible.

For longer lines, you may also find a longer liner such as the 02, 11 or 12 gives you a smoother movement than trying to construct the line with lots of tiny strokes.

Why does my French look good until I look at the whole hand?

Because consistency matters as much as an individual perfect nail.

After creating each French, compare it with the others.

Look at:

• Smile depth
• Centre position
• Side height
• French thickness
• Overall shape

Don’t create ten individual French designs.

Create one French design ten times.

Why do I keep overworking my French?

Because perfectionism gets us all. 

You create a lovely smile line.

Then you spot something microscopic.

You adjust it.

That affects the other side.

So you adjust that.

Five minutes later, you wish you’d stopped at version one.

Learn to recognise when a French is finished.

Small corrections are useful.

Constantly repainting an already good smile line usually isn’t.

Which Katie Barnes Brush Is Best for French Nails?

There’s no single answer because it depends on your technique and the French you’re creating.

French 08: Classic French and crisp smile line creation.

Short Liner 01: Micro French and tiny precision details.

Long Liner 02: Smooth, flowing freehand smile lines.

Long Striper 11: Fine, longer curves and detailed French designs.

Ultra Long Striper 12: Extra long flowing lines and creative French work.

Brush 10: Another specialist option for creating and refining your French depending on your preferred technique.

The more you understand how different brush lengths and shapes behave, the easier it becomes to select a brush because of what it does, rather than simply reaching for whatever is closest.

Want to Properly Master French Nails?

Sometimes you can read every tip in the world, but you need to see the movement to understand it.

That’s exactly why we created the Katie Barnes French Masterclass.

If you struggle with uneven smile lines, getting both sides symmetrical, brush angles, creating deeper French or simply knowing which brush and technique to use, the masterclass allows you to see the techniques demonstrated rather than trying to work everything out from a finished photograph.

You’ll learn the techniques, tips and tricks that help you create more consistent French designs and understand how your brush choice changes your result.

And because nail art is a skill, being able to go back and revisit the education while you practise can make a huge difference.

Pair your Katie Barnes nail art brushes with the French Masterclass so you’re not just buying the tool - you’re learning how to get the most from it.

The Secret to Mastering French Nails

French isn’t about having a naturally steady hand.

It’s a combination of:

Brush choice.

Product control.


Positioning.


Pressure.


Angle.


Symmetry.


Practice.

Start with the Katie Barnes French 08 if you want a specialist brush designed to help create and refine your smile line.

Then experiment with the 01, 02, 11, 12 and 10 brushes to discover different ways of creating everything from a tiny micro French to long, deep and creative smile lines.

Most importantly, don’t just practise the finished design.

Practise your centre points.

Practise curves.

Practise pressure.

Practise changing your brush angle.

Practise creating the same smile line repeatedly.

That’s how you go from hoping both hands match to knowing how to make them match.

And if French has always been that nail art technique for you, head to the Katie Barnes French Masterclass and let us take you through it step by step.