One of the most common things I hear in clinic is:
“Can you make my lips look like this celebrity?”

 

Patients often bring photos as references.

But in reality, what matters more than the photo
is the design philosophy behind the treatment.

 

Today, I’d like to share how I actually evaluate lips
and how I approach lip filler design in real practice.

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Why One Photo Isn’t Enough

Lip fillers are not simply about making lips bigger.

 

They should always be considered
within the balance of the entire face.

 

The nose, philtrum length, chin projection,
tooth show, and even chin position all matter.

 

If you overfill the upper lip alone,
it may look fine from the front,

but from the side, the lips can appear protruded.

In patients with pre-existing bimaxillary protrusion,
this can make the profile feel heavier.

 

That’s why during consultation,
I always assess lips in the mirror from:

Front view
45-degree angle
Full profile

And we decide first:
“Are we treating lips alone,
or should we consider overall facial balance?”

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Is the Ideal Lip Ratio Really 1:1.6?

A commonly cited guideline in literature is
an upper-to-lower lip ratio of about 1:1.6.

 

This means a slightly fuller lower lip
tends to look harmonious in many faces.

 

However, this is a reference — not a rule.

 

Ethnicity, facial structure, and personal aesthetics
can all shift what looks natural.

 

Some patients look better with flatter proportions,
while others suit a near 1:1 balance.

 

Instead of chasing numbers,
I prefer evaluating dynamic expressions —
how the lips look when smiling and speaking.

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Where You Fill Matters More Than How Much

Lips are composed of several distinct zones:

Vermilion border
Cupid’s bow
Central tubercle
Oral commissures

Each patient has a different concern.

 

Some have blurred borders
leading to lipstick feathering.

 

Some lack horizontal width
and feel their smile looks small.

 

Others need ratio correction.

So rather than simply adding volume centrally,
the design may focus on:

Border definition
Horizontal expansion
Ratio refinement

Every lip design is different.

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Not All Fillers Are Suitable for Lips

Lips are highly dynamic structures.
We speak, eat, and smile constantly.

 

Using firm fillers designed for the chin or cheeks
can lead to stiffness or palpable lumps.

 

Literature and clinical experience suggest
that dynamic areas like lips benefit from
lower G′ (elastic modulus) fillers —
typically soft to medium gels.

 

Some studies suggest products
below roughly 150 Pa in G′
are better suited for lip movement.

 

In simple terms:
Soft enough to move naturally.

But elasticity isn’t everything.

 

Two additional factors matter:

Cohesiveness
Swelling factor

Low cohesiveness can cause diffusion
and loss of definition.

 

High swelling profiles can lead to
temporary post-treatment puffiness.

 

That’s why I evaluate
G′, G″, cohesiveness, and swelling behavior
when selecting a lip filler.

---

My Approach to Natural Lip Design

In most cases, I follow this sequence:

First, refine the border.

 

Enhance the Cupid’s bow
and define the vermilion edge,
while adjusting oral corner angles.

 

Then I add volume conservatively,
based on proportion needs.

 

At this stage, we evaluate together:

Does 1:1.6 look best?
Or is closer to 1:1 more harmonious?

 

Rather than imposing a ratio,
we refine it in real time using a mirror.

One more step I consider essential:
dynamic evaluation.

 

During treatment, I check:

At rest
With a soft smile
With a wide smile

Because we’re not designing a photo —
we’re designing how you look in motion.

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Three Things to Check Before Lip Fillers

If you’re considering lip fillers,
here are three things worth reviewing:

 

1. Natural ratio and tooth show

How much upper teeth show when smiling?
Are lower teeth barely visible?
This affects treatment planning.

 

2. Lip condition and habits

Severe dryness, lip picking, or smoking
can influence healing and outcomes.

 

3. Previous filler history

If you’ve had fillers before,
residual material may remain.
In some cases, dissolving first is important.

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Lip Fillers Are Not Just About Volume

 

The key message today is this:

Lip fillers are not about making lips bigger.

They are about balance and design.

Facial proportions
Lip ratios (such as 1:1.6)
G′ and G″
Cohesiveness
Swelling characteristics

Even though lips are a small feature,
they have a significant impact on expression.

 

Taking a thoughtful, personalized approach
often leads to safer treatments
and higher satisfaction.

 

I hope this guide was helpful.

 

Dr. Won Daehan
PRIMI Clinic

 

📍 Primi Clinic
52 Seongsuil-ro, Seongdong-gu, Seoul, 3F (Primi Clinic)

 

📍 Primi Clinic
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