How Do I Decide Between 300cc vs 350cc Saline Breast Implants?

If you’re choosing between 300cc and 350cc saline implants, the extra 50cc could be the touch of fullness you love—or more than you want in your everyday clothes. There isn’t one right answer for everyone. Start by comparing how you feel wearing both external volumes, then discuss your preferences with your surgeon.

Maybe 300cc feels comfortable, but you wonder whether you’ll wish you had chosen a little more. Maybe you like 350cc in a dress, but worry about how it will feel at work. Those are useful questions to explore before choosing a number.

What could the extra 50cc mean to me?

350cc has 50cc more volume per implant than 300cc. That doesn’t translate into a dependable cup-size increase or the same visible difference on every woman. For you, the question may be whether that additional fullness feels welcome in the clothes and situations that make up your normal week.

You’re choosing fullness for ordinary Tuesdays, too—not just the dress you wear on Saturday night.

When you compare 300cc external sizers with 350cc external sizers, give yourself something specific to notice:

What if I wish I’d chosen the other size?

That worry can pull you in both directions. Choosing 350cc just because someone says “always go bigger” is no more personal than choosing 300cc because someone else prefers a subtle look. Give yourself a chance to discover what you enjoy.

How can I give both sizes a fair try?

The Oumènta Breast Implant Sizer Kit lets you wear external volumes discreetly inside the Pocket Bra. Try 300cc one day and 350cc another. Our suggested routine is at least six hours per session, giving each size its own day. That is Oumènta product guidance, not a clinical rule. Remove them if uncomfortable.

Wear something fitted, something loose and an outfit you would wear out. Spend some time around other people: getting coffee, shopping or meeting a friend. Notice your reaction when you catch your reflection unexpectedly. You can wear them as long as you want while comfortable, return to either size, and take the time you need.

Try the fullness in your own clothes

These fabric sizers sit inside the Pocket Bra beneath your clothing. Their labels identify external sizer volumes, not surgical implants. If you select 300cc and 350cc in the three-size kit, 325cc could be a useful third reference.

After each trial, write one sentence about what you liked and one about anything that bothered you. Our outfit guide and comparison-photo guide can help you keep the comparison consistent.

Move the slider to compare no sizers with 350cc external sizers in the Pocket Bra. Notice the added fullness under clothing. This shows one external trial against a baseline; it does not show a 300cc-to-350cc surgical change.

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No sizers versus 350cc external sizers, with the Pocket Bra in both photographs. Move the slider, or focus it and use the arrow keys. External apparel demonstration only; not surgical results or a comparison of implant profiles or fill materials.

Are women happy with saline implants?

Many women in published research have reported being happy with saline. In one study by Eric Swanson, 93 of 105 saline survey respondents—about 89%—said they would choose the same implants again. Their average result rating was 9.3 out of 10.

Some also reported visible or felt rippling, and some would have preferred silicone. Both experiences belong in the conversation. This was one surgeon’s study with relatively short follow-up, so the numbers cannot tell you how you will feel about your own result—or whether 300cc or 350cc will suit you better.

Will 350cc cost me more than 300cc?

Usually, choosing 350cc instead of 300cc within the same implant range does not, by itself, increase the price. In her explanation of implant pricing, plastic surgeon Victoria Aimé says volume typically does not change the fee. Implant type and manufacturer can matter more, and saline implants generally cost less than silicone.

Do women still choose saline?

Yes, although silicone is much more common. In the U.S. National Breast Implant Registry’s 2025 report, saline represented 10.2% of recorded aesthetic implants, compared with 88.1% silicone. Those figures describe participating practices’ registry records, not every augmentation nationwide. They tell you what is common; they don’t decide what you should prefer.

Why might I prefer saline?

There are a few features you may value when discussing saline with your surgeon:

• The initial price: saline may carry a lower quote than silicone.
• The filling: you may feel more comfortable with sterile saltwater rather than silicone gel. As the FDA explains, saline implants still have a silicone outer shell.
• A noticeable change if a leak occurs: the American Society of Plastic Surgeons explains that saline implants collapse when the shell leaks. That still needs medical attention; it doesn’t make saline maintenance-free.

Appearance and feel matter, too. Ask to handle samples and discuss concerns about firmness or visible wrinkles on your body. Wearing external sizers helps you explore volume in clothing; it cannot tell you what an implanted saline breast will feel like.

What should I ask about saline sizing?

Some saline implants are filled during surgery; others come prefilled. You don’t need to learn filling calculations. Ask your surgeon to explain the intended final volume and agree on the plan beforehand.

• “When we discuss 300cc or 350cc, is that the planned final volume?”
• “Are we planning the same amount on each side?”
• “How does the fullness I liked in my external try-ons relate to the options you recommend?”

What should I take into my consultation?

Bring your observations, labeled photos and the questions you still have. “I loved 350cc in my dress, but felt more comfortable with 300cc at work” gives your surgeon something personal to discuss. If you like both, say so—you may have found a preferred range.

Let your surgeon explain what is appropriate for your body. Your part is to describe the fullness you enjoy and what you want everyday life to feel like. For another perspective, read our general 300cc vs 350cc comparison or our size-satisfaction research summary.

Educational information only. Oumènta sizers and the Pocket Bra are apparel, not medical devices. They cannot predict surgical results, reproduce the feel of implanted breasts or determine which implant is medically suitable. Discuss implant choices and risks with a qualified plastic surgeon. Breast implants are not lifetime devices and may require further surgery.

Oumènta Editorial Team • Not medically reviewed