2026-07-21
Gangnam Station Mentor Xtra 300cc: Will it result in a full C-cup? 3 Checkpoints for Size Selection
Considering Mentor Xtra 300cc for breast augmentation? This article discusses whether 300cc will achieve a full C-cup and provides three crucial checkpoints for selecting the right implant size, emphasizing individual body conditions over a specific CC number.

Gangnam Station Mentor Xtra 300cc: Will it result in a full C-cup? 3 Checkpoints for Size Selection

Hello. I'm Dr. Kim Joo-won, Chief Director of Melon Plastic Surgery, your breast specialist with abundant solutions.
There's an implant preferred by those who like a soft touch, isn't there?
Today, I'll talk about Mentor Xtra. If you're considering breast surgery and surfing online, you'll come across the term ‘CC’ frequently. CC is a unit that refers to the volume of the implant, and implants over 300cc, as seen in the title, are a volume considered by those hoping for a full C-cup.
‘If I get Mentor Xtra over 300cc, will I get a full C-cup?’‘I have a small frame; won't anything larger than 300cc look too bulky?’
These are questions I receive countless times, and I always give the same answer: it's difficult to determine cup size simply by looking at the number 300cc. This is because the same size implant can yield different results depending on one's natural body conditions.
So, how should you choose the size? From now on, I'll tell you about three checkpoints for selecting implant size.
Mentor Xtra | Implant Size Selection Point ① Chest Width and Skin Condition

Before choosing an implant size, you need to examine your body conditions.
Let's take Mentor Xtra 310cc as an example. Even with the same 310cc implant, it might look like a full C-cup on one person, while feeling small on another. Where do these differences come from?
While there's a feeling that comes from the balance with one's natural physique and shoulder width, from a structural perspective, the size of the breast pocket can also be a reason. Inside the breast, there's a structure called the breast pocket, which is the space where the implant is inserted. However, the width and shape of this breast pocket vary from person to person.
Occasionally, people misunderstand a narrow chest as meaning a small breast pocket, but it doesn't necessarily follow the chest size like a full C-cup. Even with a narrow chest, the breast pocket can be ample.
Let's assume a 310cc implant is placed in a large breast pocket and a narrow breast pocket. Relatively speaking, if the breast pocket is wide, the same 310cc might appear spread out, and if the breast pocket is narrow, the breast might appear more projected. Skin condition also plays a role. If your skin is naturally firm and doesn't stretch much, the implant located beneath the skin will be relatively more compressed by the skin. This can give the impression that it's smaller compared to skin that stretches well.
If your skin has good elasticity and flexibility, the same Mentor Xtra 310cc can result in a more defined volume.
Breast augmentation is a surgery that aims to find the most beautiful balance. When you delicately consider how beautifully it harmonizes with your body type and conditions, and how precisely the balance is adjusted, you can find the implant size that suits you best. The first step in size selection can be an understanding of balance.
Mentor Xtra | Implant Size Selection Point ② Influence of Natural Assets

‘If I'm an A-cup and get 310cc, will I become a C-cup?’‘I already have some breast tissue; will it look excessively large?’
Natural assets refer to the breasts before surgery. If we assume a person with small breast assets gets 310cc, a C-cup is possible.
Conversely, if you naturally have some breast tissue, the same 310cc might look fuller because volume is added to your existing assets.
What we can learn here is that implant size cannot be the sole criterion.
There is no fixed number that defines a ‘perfectly beautiful’ size.
Please note as the second point that size selection should be estimated based on your natural assets.
Mentor Xtra | Implant Size Selection Point ③ Profile and Fill Rate

When looking at implants, it's good to consider the profile and fill rate, and the same applies to Mentor Xtra. As I mentioned above, even if the same size of 310cc is used, the same silhouette doesn't necessarily result. While natural body conditions play a role, the shape of the implant also affects the outcome.
The implant profile, meaning the height of the implant, creates different degrees of projection. The term ‘profile’ refers to the side view, and it means the same for implants. Simply put, this profile helps estimate how much it will project when viewed from the side. It's categorized by terms like ‘Moderate’ and ‘High,’ and even with implants of the same CC, a different profile can change the overall impression of the result. The fill rate should also be considered.
In the case of Mentor Xtra, the gel densely fills the interior of the implant. This can result in a firm appearance of the upper breast, but there's also a disadvantage: if the skin is thin or breast tissue is sparse, the projection might appear exaggerated.
The third checkpoint to consider in implant size selection is finding the appropriate profile and fill rate for your body type. If you desire large and beautiful breasts, think about the impression from the side view. The direction of the surgery subtly changes depending on whether you prioritize naturalness or emphasize presence.
Mentor Xtra | Implant Size: What to look at before the numbers?

What's more important is how it achieves balance on your chest and tissues. At Melon Plastic Surgery, we confirm the expected line together based on pre-operative ultrasound examinations. In this way, the perfectly appropriate implant size for you can be found when you can estimate the most beautiful balance achievable with your body type.
A process of medically and aesthetically evaluating what your body will look like with an implant must precede. Therefore, in breast surgery, ‘what conditions you have’ is often more important than ‘how many CCs.’
Even with the same goal of a full C-cup, the implant size can vary depending on individual body conditions. This is why we at Melon refer to breast augmentation as a ‘surgical journey.’ It's because breast augmentation doesn't end with design and execution.
The most beautiful results are achieved when many discussions about the balance between the body and the implant, the balance with daily life, and the balance with style are held, followed by precise execution, and then meticulously completed through the post-operative care process. I always feel that the solution lies in understanding, not in numbers.
If you approach it with a thorough understanding of yourself and what you desire, the results can also be stable. If you have concerns about your breasts, please talk to your doctor. We will accompany you on your surgical journey with solutions to make your breasts beautiful.
Thank you.


Frequently Asked Questions
If I get Mentor Xtra 300cc implants, will I definitely achieve a full C-cup?
No, it is difficult to definitively say that using Mentor Xtra implants of 300cc or more will result in a full C-cup. Even with the same size implant, the outcome can vary depending on individual body conditions such as chest width, skin condition, and natural breast tissue.
What is the most important factor when choosing implant size?
The most important factor when choosing implant size is the balance between individual body conditions and the implant. You should comprehensively consider your chest width, skin elasticity, natural breast tissue volume, and the implant's profile and fill rate to find the size that best suits you.
Is it difficult to insert large implants if I have a narrow chest?
No, a narrow chest does not necessarily mean a small breast pocket. Even with a narrow chest, the breast pocket can be spacious, and the degree of projection or spread can vary with the same implant depending on the width of the breast pocket.
What are the profile and fill rate of Mentor Xtra implants?
The implant's profile refers to its height, or how much it protrudes when viewed from the side. The fill rate refers to how densely the gel inside the implant is filled, and Mentor Xtra implants are densely filled with gel, which affects the expression of upper breast volume.
Does natural breast tissue affect implant size selection?
Yes, natural breast tissue significantly affects implant size selection. The final volume and fullness can feel different when a person with small natural breast tissue gets 310cc implants compared to someone with a certain amount of natural breast tissue getting the same 310cc implants.
Why is an ultrasound examination necessary before breast surgery?
An ultrasound examination before breast surgery is necessary to accurately assess an individual's chest and tissue condition and confirm the expected lines. This helps the medical team determine the most appropriate implant size and shape for the patient's body type and achieve a beautiful balance.