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What Is the Pretty Height for an Out-Line Double Eyelid? Director Park Si-hyeon’s Answer!

Objet Plastic Surgery · 오브제성형외과의원 · February 15, 2026

Out-line double eyelid What Is the Pretty Height? ○ mm? Director Park Si-hyeon’s Answer! Hello. This is Objet Plastic Surgery. If you came here to read this post, you’re probably c...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: Objet Plastic Surgery

Original post date: February 15, 2026

Translated at: April 22, 2026 at 2:20 PM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

Out-line double eyelid

What Is the Pretty Height? ○ mm?

Director Park Si-hyeon’s Answer!

What Is the Pretty Height for an Out-Line Double Eyelid? Director Park Si-hyeon’s Answer! image 1

Hello.

This is Objet Plastic Surgery.

If you came here to read this post,

you’re probably considering double eyelid surgery.

What you’re most curious about right now is probably:

"Exactly how many mm high should it be

to create a pretty out-line?"

If you search online,

some places say 8 mm,

while others say 10 mm,

and some reviews say

6 mm is enough,

so it’s not easy to set a standard.

As a result,

it only creates more confusion:

"Then what height is right for me,

even in mm?"

Today, I’d like to help clear up some of that confusion.

I’ll explain why the ideal height

is said differently for each person,

and what matters more than the number itself,

one by one.

If you read to the end,

you’ll have a clearer idea of

what 기준 to use when discussing it during a consultation.

Out-line double eyelid,

Is there a correct answer? O mm?

First, the most important thing to say is:

"There is no fixed height for an out-line double eyelid."

There is no exact formula like

9 mm means out-line, 8 mm means semi-out.

What Is the Pretty Height for an Out-Line Double Eyelid? Director Park Si-hyeon’s Answer! image 2

In actual double eyelid consultations,

I often get questions like,

"Director, how many mm would make me look pretty?"

Or,

"If I want eyes like a certain celebrity,

what height in mm should I choose?"

My answer in those situations is always the same.

"That number itself

is not important because it differs from person to person,

and we only measure it once

for the purpose of matching the height of both eyelids."

What Is the Pretty Height for an Out-Line Double Eyelid? Director Park Si-hyeon’s Answer! image 3

That’s because even with the same 8 mm,

it may become a natural out-line double eyelid for one person,

but it may feel too much for someone else.

In some cases, even 6 mm

can look like 8 mm.

On the other hand,

there are also people for whom

the eyelid crease does not show well

even when it is set fairly high.

Why the same height can look different <4 reasons>

Even with the same height,

the reason double eyelids look different

can be divided into four main factors.

① Thickness of the eyelid skin

For people with thin skin,

the skin covering the double eyelid does not overlap much,

so the line tends to look larger.

For example, even if the height is set at 6 mm,

thin skin may make it look as clear as 8 mm.

Conversely, people with thicker skin often find that

the crease is not well exposed

even when it is set quite high.

The skin itself

covers the line.

In such cases,

even with the same height,

it can feel much more natural.

What Is the Pretty Height for an Out-Line Double Eyelid? Director Park Si-hyeon’s Answer! image 4

② Eye length and curve

If the horizontal length of the eyes is short,

the line’s curve may look short

and thick.

Even after creating a double eyelid,

if the eye length is not sufficient,

the overall look may feel cramped or

may come across as

unnatural.

On the other hand,

for people with longer eyes,

even the same height allows the line to spread out longer,

creating a much fresher and clearer impression.

This is why the harmony between

the eye’s horizontal length

and the double eyelid line matters.

③ Size of the epicanthal fold

To create an out-line double eyelid,

the crease must basically form

higher than the epicanthal fold.

What Is the Pretty Height for an Out-Line Double Eyelid? Director Park Si-hyeon’s Answer! image 5

However, the height of the eyelid crease

connected to that epicanthal fold

differs from person to person,

but in general it is around

9–11 mm.

In other words,

it needs to be set higher than this value,

but if the epicanthal fold is large,

it needs to be set even higher,

and if it is small,

a relatively lower height can still produce

an out-line effect.

Alternatively, you can also consider

an inner corner procedure or upper corner procedure

so that the epicanthal fold itself

becomes smaller.

What Is the Pretty Height for an Out-Line Double Eyelid? Director Park Si-hyeon’s Answer! image 6

④ Eye-opening strength

The strength used to open the eyes,

that is, the power of the levator muscle,

also has an effect.

For people with weaker eye-opening strength,

the double eyelid line is more easily hidden by the eyelid,

so it needs to be set a little higher

to look clear.

On the other hand,

for people with stronger eye-opening strength,

even a lower height is enough

to show the line well,

so there is no need to set it too high.

This is also a factor with

large individual differences.

What matters more than the number?

It is OO

To summarize,

the out-line double eyelid line is about

much more than a number in mm;

the harmony that suits my face and eye structure

is far more important.

What Is the Pretty Height for an Out-Line Double Eyelid? Director Park Si-hyeon’s Answer! image 7

Even if the same number is applied,

it may look more natural for one person

and unnatural for another.

Of course, to make the eyes look bigger,

the line does need to be

at a certain height,

but if it is too high,

it can create an artificial look.

That is why it is important

to set the height that suits you.

Rather than focusing too much on whether it is inner or outer,

it is better to look for the line

that suits you.

The ideal line and height differ depending on

the overall structure of the eyes,

such as eye size, skin thickness,

eye-opening strength, and the size of the epicanthal fold.

When consulting,

instead of saying, "Please make it X mm," it is much wiser to say,

"Please find the line that suits me."

What Is the Pretty Height for an Out-Line Double Eyelid? Director Park Si-hyeon’s Answer! image 8

That way, you can avoid being tied to numbers

and find the most harmonious line

for your eyes.

Today, we talked about why

the height of an out-line double eyelid

is not fixed,

and why it can look different from person to person

even at the same height.

In the end, what matters is not the number of "mm,"

but a customized design that considers

the structure of your eyes

and the balance of your entire face.

No matter how trendy a line may be,

it has no meaning if it does not suit your face.

Director Park Si-hyeon of Objet Plastic Surgery

carefully identifies each patient’s eye structure,

and considers it the basic principle of treatment

to find the most harmonious line

without being bound by numbers.

What Is the Pretty Height for an Out-Line Double Eyelid? Director Park Si-hyeon’s Answer! image 9

Based on outstanding experience

in double eyelid procedures,

and with a patient-centered consultation style

that is gentle and detailed,

we take pride in a high level of satisfaction.

When receiving a consultation,

please be sure to check whether they are a place that thinks together with you

about "what line suits me."

This has been Objet Plastic Surgery.

Thank you.

<🔽🔽A helpful video to watch together🔽🔽>

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  • This post contains medical information written by Objet Plastic Surgery Clinic in compliance with the Medical Advertising Act.

  • Results may vary depending on the individual, and side effects may occur. We recommend that you consult thoroughly with medical staff in advance before deciding on a procedure.

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