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

Drag the slider to compare the same model without sizers and wearing 350cc Oumènta breast implant sizers.

External sizing demonstration only. Not a prediction of surgical results.

See the difference with and without 300cc Oumènta breast implant sizers. External sizing demonstration only. Not a prediction of surgical results.

The same 300cc, 350cc, and 400cc sizer combination is available with these other Pocket Bra sizes:

• Extra Small (XS) Pocket Bra
• Small (S) Pocket Bra
• Medium (M) Pocket Bra
• Extra Large (XL) Pocket Bra

Choose your Pocket Bra size based on your current fit, not your desired breast implant volume.

A Little Smaller? If you're considering less fullness, explore our 250cc vs. 300cc vs. 350cc Breast Implant Sizer Kit with Large Bra .

A Little Larger? If you'd like to compare fuller options, explore our 350cc vs. 400cc vs. 450cc Breast Implant Sizer Kit with Large Bra .

Want a different combination? Build your own custom Oumènta breast implant sizer kit using three available volumes from 200cc to 500cc.

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 on Preoperative Breast Implant Sizing

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 About 325cc or 375cc?

If you find that 300cc is a little too small and 350cc is slightly too full, you may want to compare 325cc.

Likewise, 375cc offers an intermediate option between 350cc and 400cc.

Oumènta offers individual breast implant sizers in 25cc increments from 200cc to 500cc, allowing you to refine your comparisons.

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.