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300cc vs. 350cc vs. 400cc Breast Implant Sizers | L Bra

300cc vs. 350cc vs. 400cc Breast Implant Sizers | L Bra

Regular price $199.00
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Compare Breast Implant Sizes with a Large Pocket Bra

Considering 300cc, 350cc, or 400cc breast implants? If you wear a Large pocket bra, you may be wondering how these different volumes will change your silhouette and which one will feel most comfortable in your everyday clothing.

The Oumènta Breast Implant Sizer Kit includes three pairs of wearable breast implant sizers and a Large pocket bra. Compare all three sizes at home, where you can experience the differences throughout your normal routine rather than relying on photographs or a few minutes in front of a mirror.

From 300cc to 400cc: Explore a 100cc Range

300cc: The smallest option in this kit. A useful starting point if you want to explore additional fullness while keeping a comparatively restrained external silhouette.

350cc: The middle option, with approximately 17% more volume than 300cc. It allows you to compare whether an additional 50cc produces the fullness you prefer.

400cc: The largest option, with approximately 33% more volume than 300cc. This gives you an opportunity to explore a fuller silhouette and compare the difference in weight and clothing fit.

The same implant volume can look different from one woman to another. Existing breast tissue, chest measurements, implant dimensions, profile, and surgical placement all influence the eventual surgical result.

Why Your Starting Proportions Matter

Two women considering 350cc breast implants may have very different expectations and results. One may already have considerable natural breast fullness, while another may be starting with less breast tissue.

That's one reason cup-size predictions and before-and-after photographs can be misleading. Even when two women choose the same implant volume, their results may look quite different.

Oumènta lets you compare external volumes on your own body, with the pocket bra size you've selected. It doesn't predict surgical outcomes, but it can help you identify the relative fullness you prefer.

Try Each Size Beyond the Fitting Room

Start with 300cc in a favorite blouse or fitted T-shirt. Then compare 350cc in the same outfit. Finally, wear 400cc and notice whether the additional fullness feels right for your personal style.

Take your comparisons into everyday life. Walk, drive, carry groceries, or perform comfortable exercise while the sizers are securely positioned. Pay attention to clothing fit, external weight, and how you feel with each silhouette.

Wear each size for as many days as you need. You can switch between sizes, revisit your favorites, and bring your observations to your plastic surgeon.

Research Supports Participating in Your Size Decision

567 Women Studied

In a published study involving 567 women, researchers found that women who participated in preoperative breast implant sizing reported greater satisfaction and were less likely to want a different implant size after surgery.

The study used silicone implant samples in bras, not Oumènta sizers, but its findings support the value of comparing sizes before surgery.

Read the published preoperative sizing study

Curious about a volume between 300cc and 350cc? Explore our 325cc breast implant sizers before-and-after comparison.

For more guidance on selecting implant sizes, visit our Breast Implant Sizing Guide.

What's Included in Your Oumènta Kit

1 Oumènta Pocket Bra in Large
1 set of 300cc implant sizers
1 set of 350cc implant sizers
1 set of 400cc implant sizers

Prefer Different Sizes?

Create your own Oumènta breast implant sizer kit! Choose any three sizes in 25cc increments, from 200cc to 500cc, to find the combination that's right for you.

Custom Sizer Kit →

300cc vs. 350cc vs. 400cc FAQ

Click any question to see the answer.

How different will 300cc and 400cc look on my body?

400cc contains approximately 33% more volume than 300cc. The visible difference depends on your existing breast tissue, body proportions, and the external shape of the sizers. Trying both sizes under the same clothing can help you compare their relative fullness.

Does wearing a Large bra mean I need larger implants?

No. Your pocket bra size does not determine which breast implant volume is appropriate. A Large pocket bra is selected for fit, while implant size depends on your anatomy, existing breast tissue, and personal goals. Your surgeon can help evaluate suitable implant options.

Is 350cc a good middle ground between 300cc and 400cc?

350cc is exactly halfway between 300cc and 400cc by volume. Trying all three can help you decide whether you prefer the smaller, middle, or larger external silhouette rather than choosing solely from numbers.

Can I use the sizers to compare how different sizes feel during exercise?

You can explore comfortable everyday activities and appropriate exercise when the sizers are securely held in the pocket bra. Stop if they shift or cause discomfort. External sizers cannot reproduce the exact movement or physical effects of surgically implanted breasts.

What if I want to compare 325cc, 350cc, and 375cc instead?

Our custom breast implant sizer kit lets you choose any three sizes from 200cc to 500cc in 25cc increments. This is useful if you'd prefer to compare smaller volume differences.

Important: Oumènta sizers are wearable, experiential sizing aids—not medical devices or actual breast implants. They do not predict surgical results or reproduce the exact weight, shape, movement, or feel of implanted breast implants. Always consult a qualified plastic surgeon before making surgical decisions.

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A stack of five white breast Implant Sizers varying sizes, isolated on a plain white background.

Try sizes for days.

Wear each pair at home as long as you need, instead of a few minutes in a consultation room.
Oumènta white pocket bra with internal pockets designed to hold breast implant sizers for at-home size comparisons.

Under your own clothes.

The pocket bra holds the sizers in place at work, at the gym, and in everyday life.
Breast implant sizer try on kit.

Take it to your doctor.

Show your doctor the size you actually liked, not a guess.