300cc vs. 350cc vs. 400cc Breast Implant Sizers | XL 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:

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

Your Pocket Bra size should reflect your current fit, not the breast implant volume you're considering.

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

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

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

Why Compare Sizes Above and Below 350cc?

Choosing a breast implant size often begins with a number. Perhaps your surgeon mentioned 350cc, or you liked photographs of women with that implant volume.

But a photograph cannot tell you how a particular volume will look on your body. By comparing 300cc, 350cc, and 400cc, you can explore whether your original preference still feels right.

300cc: The smallest volume in this kit. It offers a reference point for exploring a less full external silhouette.

350cc: The middle option, containing approximately 17% more volume than 300cc. This may help you determine whether an additional 50cc creates a difference you prefer.

400cc: The largest option, containing approximately 33% more volume than 300cc. Compare it with the other two sizes to explore whether additional fullness better matches your goals.

These percentages describe volume differences, not predicted cup-size changes or surgical results. Your existing breast tissue, chest dimensions, implant profile, and placement influence your eventual appearance.

How Much Difference Does 50cc Make?

The difference between 300cc and 350cc is 50cc. The difference between 350cc and 400cc is another 50cc.

Although these increments are numerically identical, their visual impact may feel different depending on your existing proportions and personal preferences.

Try each volume in the same fitted shirt or dress. Look at your silhouette from the front and side, and compare photographs taken under similar lighting and conditions.

You may discover that the difference is more noticeable than you expected—or that your preferred size changes after spending more time with each option.

Does Wearing an Extra Large Bra Change Your Implant Size Options?

Your Pocket Bra size and your preferred implant volume are separate decisions.

Wearing an Extra Large Pocket Bra doesn't automatically mean you need larger breast implants. You might prefer the external fullness of 300cc, 350cc, or 400cc regardless of your bra size.

The Oumènta Pocket Bra holds the sizers securely for home comparisons. Your plastic surgeon can evaluate which actual implant dimensions and volumes are appropriate for your anatomy.

Experience Different Sizes Beyond the Consultation Room

Trying on implant samples during a consultation can be helpful, but the experience is usually brief.

With Oumènta, you can compare sizes at home while wearing the clothes you actually use. Try the sizers while walking, driving, shopping, or performing comfortable everyday activities.

Wear each size for as many days as you need. Return to a favorite size, compare it with the others, and take notes about what you like.

These are external wearable sizing aids. They cannot reproduce the exact movement, weight distribution, or feel of surgically implanted breasts.

Research on Preoperative Breast Implant Sizing

What About 325cc or 375cc?

If you find yourself deciding between 300cc and 350cc, you may want to compare 325cc. If you're torn between 350cc and 400cc, consider 375cc.

Oumènta offers individual breast implant sizers in 25cc increments from 200cc to 500cc, giving you additional options for refining your preferences.

See our 325cc breast implant sizers before-and-after comparison and explore more sizing advice in the Breast Implant Sizing Guide .

Is 350cc noticeably bigger than 300cc?

350cc contains approximately 17% more volume than 300cc. Whether the difference looks substantial depends on your proportions and the external shape of the sizers.

How different will 400cc look compared with 350cc?

400cc contains approximately 14% more volume than 350cc. The visual difference varies with your anatomy and clothing. Oumènta sizers let you explore the external difference, but don't predict surgical results.

Can I choose 300cc implants if I wear an XL bra?

Possibly. Your bra size alone doesn't determine which implant volume is appropriate. Your surgeon will consider your breast tissue, chest dimensions, and other anatomical factors when discussing implant options.

How long should I wear each sizer size?

Wear each size for as many days as you need to compare your preferences. Try different outfits and ordinary activities, and revisit the volumes you're considering most seriously.

Can I compare 325cc and 375cc breast implant sizers?

Yes. Oumènta offers individual sizer pairs in 25cc increments, including 325cc and 375cc. You can also select any three sizes between 200cc and 500cc when building a custom kit.