300cc vs. 350cc vs. 400cc Breast Implant Sizes: How Much Is Enough?
Are you hoping for noticeably fuller breasts without going too big? Is 300cc enough to achieve the change you want, or could choosing 400cc leave you happier with your new silhouette?
Explore our 300cc, 350cc, 400cc breast implant sizers to experience all three sizes at home.
For a woman wearing a Medium bra, this range offers three distinct volumes to explore. Moving from 300cc to 350cc adds approximately 17% more volume, while 400cc represents a 33% increase over 300cc.
The challenge isn't simply choosing a size that looks attractive in the mirror. It's choosing the fullness you feel comfortable living with.
Experience Your Size During Real Activities
Try 300cc while running errands or driving. Wear 350cc during a workout or while lifting weights. 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.
What's Included in Your Oumènta Kit
1 Oumènta Pocket Bra — Medium
1 pair of 300cc breast implant sizers
1 pair of 350cc breast implant sizers
1 pair of 400cc breast implant sizers
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.
Prefer Different Sizes?
Create your own Oumènta kit! Choose breast implant sizers 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.
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.
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.
