400cc vs. 450cc vs. 500cc Breast Implant Sizers | L Bra

Drag the slider to compare the same model without sizers and wearing 450cc Oumènta breast implant sizers.

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

Drag the slider to compare the same model without sizers and wearing 450cc Oumènta breast implant sizers.

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

The same 400cc, 450cc, and 500cc sizer combination is available with these other Pocket Bra sizes:

• Small (S) Pocket Bra
• Medium (M) Pocket Bra
• Extra Large (XL) 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 350cc vs. 400cc vs. 450cc Breast Implant Sizer Kit with Large Bra .

Prefer a more customized comparison? Build your own custom Oumènta breast implant sizer kit with three available volumes from 200cc to 500cc.

400cc vs. 450cc vs. 500cc: What's the Difference?

400cc: The smallest option in this kit, but still a substantial volume. It provides a starting point for women who want to explore a fuller silhouette without immediately choosing the largest option.

450cc: Offers 12.5% more volume than 400cc. This middle option helps you discover whether an additional 50cc creates the fullness you prefer.

500cc: The largest option in this kit, with 25% more volume than 400cc. Comparing these two sizes can help you explore a meaningful difference in external fullness, clothing fit, and weight.

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

What Does an Extra 100cc Really Feel Like?

When comparing 400cc and 500cc, the difference isn't limited to how your breasts might look in a photograph.

An additional 100cc of silicone implant volume corresponds to approximately 100 grams of additional weight per implant, or about 200 grams (7 ounces) for a pair. Actual implant weights vary, and Oumènta sizers do not reproduce the precise weight distribution or movement of implanted breasts.

Try 400cc while wearing a fitted blouse or T-shirt. Then switch to 450cc. Finally, compare 500cc with those same outfits.

Notice how the external fullness changes when you reach for the steering wheel, carry groceries, walk, or perform comfortable exercise with the sizers securely positioned.

Wear each size for as many days as you need. You might discover that 450cc provides the balance you're looking for—or that you genuinely prefer the additional fullness of 500cc.

What If You're Afraid of Choosing Too Small?

Choosing breast implant size can involve two competing concerns: going too big and wishing you'd gone bigger.

Perhaps 400cc initially seems like the sensible choice. But after spending time with 450cc and 500cc, you might discover that you prefer a fuller silhouette. Or you may find that the larger sizes aren't what you want for your everyday lifestyle.

The purpose of trying different sizes isn't to encourage you to choose larger implants. It's to help you explore your preferences before discussing your options with your plastic surgeon.

Research on Preoperative Breast Implant Sizing

For a closer look at choosing between two larger implant volumes, read our 450cc vs. 500cc breast implant comparison .

You can also explore additional sizing questions in our Breast Implant Sizing Guide .

What About 425cc or 475cc?

If you find that 400cc is a little too small and 450cc is slightly too full, you may want to compare 425cc.

Likewise, 475cc offers an intermediate option between 450cc and 500cc.

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

Is there a noticeable difference between 400cc and 450cc?

450cc contains 12.5% more volume than 400cc. Whether that difference appears substantial depends on your proportions, clothing, and the shape of the external sizers. Trying both sizes can help you compare their fullness during normal activities.

Will 500cc breast implants look too big on me?

There is no universal answer. A 500cc implant may create very different results depending on your chest dimensions, existing tissue, implant profile, and surgical placement. External sizers help you explore the silhouette you prefer, while your surgeon determines which implant options are appropriate for your anatomy.

How much heavier are 500cc implants than 400cc implants?

For silicone implants, an additional 100cc of volume generally corresponds to approximately 100 grams of additional weight per implant, or about 200 grams for a pair. Actual weights vary by implant type and construction. Oumènta sizers allow you to explore external weight differences but cannot reproduce the exact effects of implanted breasts.

Will 450cc or 500cc breast implants give me a D cup?

Not necessarily. There is no reliable conversion from implant volume to bra cup size. Your starting breast tissue, chest measurements, implant dimensions, and surgical placement influence the result. Your plastic surgeon can help evaluate your goals and anatomical options.

What if I want to compare 425cc, 450cc, and 475cc instead?

Our custom breast implant sizer kit lets you select any three volumes from 200cc to 500cc in 25cc increments. This can be useful when you're narrowing your preferences and want to compare smaller differences between larger implant volumes.