In Hybrid Breast Augmentation, Size Is Not the Only Important Factor2026.05.03
Why Implant Projection and Fat Grafting Are Essential for a Natural Yet Voluminous Result
Hybrid breast augmentation combines silicone breast implants with fat grafting.
The implant creates stable volume, while fat grafting helps soften the contour and create a more natural appearance.
This allows us to pursue both:
- Breast size
- Softness
- Natural contour
- Beautiful projection
However, the most important point in hybrid breast augmentation is not simply “how many cc” are used.
The key factors are:
implant size and implant projection.
Cup Size Alone Does Not Determine the Final Look
Many patients ask:
“I want to be a C cup.”
“I want to become a D cup.”
“How many cc do I need to reach my ideal cup size?”
Cup size can be useful as a general reference.
However, the actual appearance of the breasts is not determined by cup size alone.
Even with the same cup size, the final look can vary depending on:
- Chest width
- Skin elasticity
- Thickness of breast tissue
- Shoulder width
- Body shape
- Original breast position
- Thickness of the décolletage area
For this reason, at AVAN TOKYO, we do not decide implant size only by cup size.
We focus on:

how much forward projection the patient wants.
Forward Projection Defines the Breast Impression
Breast beauty is not only about size from the front.
The side profile is also extremely important.
If projection is modest, the breasts look elegant and natural.
If projection is stronger, the breast enhancement effect becomes more obvious.
Therefore, implant selection should be based on:
- How natural the patient wants the result to look
- How much volume they want
- How they want to look in clothing
- How much presence they want in swimwear or dresses
- How much projection they want from the side
This is why implant height and projection are essential in breast design.
How We Use Motiva Mini and Demi
Many slim Japanese and Asian patients have relatively thin skin and breast tissue.
This means implant edges and contours may be more visible if the implant is not selected carefully.
At AVAN TOKYO, when using Motiva implants, we often choose:
- Mini
- Demi
depending on the patient’s anatomy and desired result.
Motiva Mini
Mini is suitable for patients who want a more natural and subtle result.
It provides moderate volume with a softer and less projected appearance.
Motiva Demi
Demi provides more forward projection than Mini.
It is suitable for patients who want a clear size increase while still maintaining a natural overall look.
In this case, Motiva Demi 325cc was placed in the subglandular plane.
For a slim patient, this is slightly on the larger side, but with proper planning, it can gradually settle into a more natural appearance.
Why Fat Grafting Is Used to “Coat” the Implant
One of the greatest advantages of hybrid breast augmentation is that it does not rely on the implant alone.
The implant creates the foundation of volume.
Fat grafting is then used around the implant to soften the contour.
Fat grafting can help:
- Camouflage implant edges
- Create a smoother décolletage transition
- Refine the cleavage area
- Adjust asymmetry
- Improve softness and natural texture
For slim patients, fat grafting is especially important because implant edges may be more visible when there is limited soft tissue coverage.
In hybrid breast augmentation, fat acts as a natural “coating” around the implant.

Characteristics of Subglandular Placement
In this case, Motiva Demi 325cc implants were placed in the subglandular plane.
Subglandular placement can help preserve natural breast movement and make use of the patient’s original breast shape.
However, in patients with thin skin or limited breast tissue, implant contours may become more noticeable.
That is why fat grafting is extremely important when using subglandular placement in slim patients.
At AVAN TOKYO, we carefully design the implant plane and fat grafting area based on:
- Body type
- Skin thickness
- Desired size
- Breast shape
- Desired projection
- Overall upper body balance
What to Expect at 1 Month Post-Operative
At 1 month after hybrid breast augmentation, the final result has not yet been reached.
Patients may still experience:
- Tightness
- Firmness in the upper breast
- Swelling
- Temporary asymmetry
- Implants appearing slightly high
When a slightly larger implant such as 325cc is used, the breasts may still look firm or tight at 1 month.
Over time, the breasts gradually change as:
- The implant settles
- The grafted fat stabilizes
- The skin stretches
- The breast movement becomes more natural
- The overall contour softens
The result usually becomes more natural over 3 to 6 months.

AVAN TOKYO’s Approach to Hybrid Breast Augmentation
At AVAN TOKYO, breast augmentation is not simply about increasing breast size.
We design the entire upper body balance.
We focus on:
- Implant size
- Implant projection
- Forward breast projection
- Transition from décolletage to cleavage
- Natural fat grafting coverage
- Balance with arms and underarm areas
- The final result at 3 to 6 months
Breast augmentation should not simply make the breasts larger.
The goal is to create volume while maintaining naturalness, softness, and harmony with the body.
Final Message
In hybrid breast augmentation, the key is not just cup size.
What matters is:
How much forward projection is desired.
Which implant height and profile are appropriate.
How fat grafting can make the result look natural.
For slim Japanese and Asian patients, Motiva Mini or Demi implants combined with fat grafting can help achieve both reproducible volume and natural beauty.
At AVAN TOKYO, we carefully design implant size, implant projection, placement layer, and fat grafting areas for each patient to create a natural and beautiful breast contour.