300cc vs. 350cc vs. 400cc Breast Implant Sizers | M 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.

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
• Large (L) 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 Medium Bra .

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

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

Experience Your Size During Real Activities

Try 300cc while running errands or driving. Wear 350cc during comfortable exercise. Then experience 400cc while carrying groceries, bending forward, or trying on your favorite clothes.

Does 300cc feel like enough? Does 350cc offer your preferred balance? Or does 400cc give you the fuller silhouette you've been imagining?

Don't overlook the additional weight. A 100cc increase in silicone implant volume corresponds to roughly 200 grams (7 ounces) of additional weight for a pair, although actual implant weights vary.

Oumènta sizers let you explore differences in external volume and weight, but cannot reproduce the exact experience of implanted breast implants.

Why Comparing Sizes Matters

These findings illustrate why discussing your expectations with your surgeon matters. For more information, read our guide to at-home breast implant sizing .

300cc vs. 350cc vs. 400cc: Understanding the Differences

300cc: The smallest option in this kit. A useful starting point for exploring a fuller silhouette without immediately choosing the largest volume.

350cc: Contains approximately 17% more volume than 300cc. This middle option helps you compare whether an additional 50cc creates the fullness you prefer.

400cc: Contains approximately 33% more volume than 300cc. Comparing these two sizes helps you explore a meaningful difference in external fullness and clothing fit.

These percentages describe volume differences, not guaranteed cup-size changes or surgical outcomes.

Why Your Body Proportions Matter

Two women considering the same implant volume may have very different starting proportions. Existing breast tissue, chest dimensions, implant profile, and surgical placement influence the eventual result.

Oumènta sizers allow you to explore external fullness on your own body, rather than relying entirely on photographs of other women.

Live With Different Sizes Before Deciding

Start with 300cc under a favorite T-shirt or blouse. Switch to 350cc, then try 400cc with the same clothing.

Pay attention to the differences while standing, walking, reaching forward, or performing comfortable everyday activities.

Wear each size for up to 24 hours. Compare how they look under clothing, how they feel during movement, and which size you prefer.

Don't just imagine the difference. Live with it.

What About 325cc or 375cc?

If 300cc seems a little too small and 350cc feels slightly too full, you can explore 325cc.

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

Oumènta offers individual sizer pairs in 25cc increments from 200cc to 500cc.

Is 300cc enough for a noticeable breast augmentation?

300cc may produce a noticeable change, but the appearance depends on your existing breast tissue, chest width, and body proportions. Trying 300cc alongside 350cc and 400cc helps you discover whether the smaller volume creates the silhouette you prefer.

Will I regret choosing 300cc instead of 400cc?

There's no way to predict whether you'll regret a particular size. Some women prefer a subtle enhancement, while others discover they want more fullness. Comparing both volumes during your everyday routine may help you clarify your preferences before discussing them with your surgeon.

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

350cc is exactly halfway between these two volumes, making it a useful comparison point. But that doesn't automatically make it the best choice. Try all three under fitted and loose clothing to see which proportions you prefer.

How will 400cc feel when running or lifting weights?

External 400cc sizers may feel fuller and heavier than 300cc sizers during movement. Try appropriate activities with the sizers securely positioned in your Oumènta Pocket Bra. Remember that external sizers do not move or feel exactly like surgically implanted breast implants.

Will a 400cc implant give me a D cup?

Not necessarily. Implant volume cannot reliably predict a specific cup size. Your starting breast size, chest measurements, implant profile, and bra manufacturer all affect the result. Use Oumènta sizers to explore your desired appearance, and ask your surgeon which implant dimensions may be appropriate for your anatomy.