425cc Breast Implant Sizers

Drag the slider to compare the same model without sizers and wearing 400cc Oumènta sizers. 425cc adds 25cc of volume per side to the size shown here.

Shown: 400cc sizers in the Oumènta Pocket Bra (bra not included with this pair). External sizing demonstration only. Not a prediction of surgical results.

For maximum discretion, we recommend the Oumènta Pocket Bra. Its internal pockets hold the sizers in place under your clothes, at work, at the gym, and out in public, and keep each size in the same position so your comparisons stay fair.

For trying the sizers at home, they can also be worn in a snug sports bra or a full-coverage bra.

Already own an Oumènta kit? Your Pocket Bra works with this pair. If you're buying a Pocket Bra with a kit, choose it by your current band size:

If you have a 32" band or smaller, choose Small (S) for 425cc and other sizes over 400cc, for extra room.

You own a kit with 400cc and 450cc. If one felt slightly too small and the other slightly too full, add 425cc to try the middle.

You want to try 425cc at home in your own bra. If you mainly want to see how 425cc looks at home, a single pair worn in your own sports bra or full-coverage bra may be all you need. If you'd also like to wear them out in public, a full-coverage bra or an Oumènta Pocket Bra you already own works best.

You've narrowed your choice to 425cc. Spend more time with the size before your consultation, through workdays, weekends, and different outfits.

You liked 400cc but wondered about a little more. Adding 425cc lets you test that thought before you commit to a size.

Try the Sizes on Either Side. Compare 25cc steps with our 400cc and 450cc sizer pairs, or 50cc steps with our 375cc and 475cc pairs.

Compare Two Sizes Side by Side. Try our 375cc vs. 425cc 2-Pack, or choose any two volumes with our Choose-Any-2 Sizer Kit. Both include a Pocket Bra.

Compare Three Sizes. Build a custom kit with 400cc, 425cc, and 450cc, or explore our 400cc vs. 450cc vs. 500cc 3-Pack or 350cc vs. 400cc vs. 450cc 3-Pack.

Why the Number Can Feel Bigger Than the Difference

425cc has about 6% more sizer volume than 400cc, and 450cc has about 6% more than 425cc. That doesn't mean your breasts will look 6% larger. The percentage describes the volume of the sizer, not your overall breast size.

Round numbers like 400 can shape decisions more than the actual change in volume. Wearing both sizes takes the number out of the decision and leaves you with what you actually see and feel.

If worry about the number is part of your decision, read I Wish I'd Gone Bigger!! How Fear Can Influence Breast Implant Size Decisions.

How 425cc Can Look on Different Women

Your frame. On a taller or broader frame, 425cc can look full but proportionate. On a petite frame, it can look more prominent.

Your chest width. A wider chest spreads volume across more space; a narrow chest concentrates it.

Your existing breast tissue. 425cc added to very little tissue can look like a bigger change than 425cc added to a fuller starting size.

After surgery, implant profile and placement also affect how a given volume looks. Your plastic surgeon will assess these with you.

Three Ways to Judge 425cc at Home

The blind comparison. If you own 400cc sizers, ask someone you trust to put one size in each pocket of your bra, without telling you which is which. Note which side you prefer before you check.

The fitted-top test. Wear 425cc in a fitted top or dress you already own. Notice whether it fits the way you'd want it to every day.

The full-day test. Wear 425cc from morning to evening. Notice how the size feels by the end of the day, not just in the first few minutes.

For a look at the larger end of the range, read 400cc vs. 500cc Breast Implants: How Much Bigger?

What Cup Size Is 425cc?

There's no reliable conversion between implant volume and cup size. The same volume can look different on two women, and cup sizes vary between bra brands. Oumènta sizers show you external volume under clothing; they can't predict your cup size after surgery.

For more on volume and cup size, read A Cup to C Cup Breast Implants: How Many CCs?

Why Try Sizes Before Surgery?

In a published study of 567 women, a group who tried silicone implant samples in a bra before surgery generally reported that the preoperative sizing process was helpful. The study used implant samples, not Oumènta sizers, and doesn't show that Oumènta products affect surgical outcomes.

Read the published preoperative sizing study.

Keep Exploring

Try our Breast Implant Size Calculator for a suggested range of sizes to try, or read How to Choose the Right Breast Implant Size. You can also browse our full Breast Implant Sizing Guide.

Is 425cc much bigger than 400cc?

425cc has 25cc more volume per breast, about 6% more sizer volume than 400cc, or roughly 1.7 tablespoons per side. Some women can see the difference in fitted clothing; others notice it mainly in how their clothes fit.

Should I get 400cc or 425cc breast implants?

That's a decision for you and your plastic surgeon. Wearing both sizes at home can help you understand which look you prefer. Your surgeon will assess your anatomy and recommend implant dimensions that suit you.

Is 425cc a large breast implant size?

425cc is toward the larger end of commonly discussed implant volumes, but how it looks depends on your frame, chest width, and existing breast tissue, not the number alone.

Can I wear 425cc sizers without the Pocket Bra?

Yes. For trying them at home, the sizers can be worn in a snug sports bra or a full-coverage bra. For wearing them discreetly in public or through a full day, we recommend the Oumènta Pocket Bra.

Why buy a single pair instead of a kit?

A single pair is a good fit if you already own an Oumènta kit and want to add 425cc, or if you've narrowed your choice to this size. If you're still exploring, a 2-Pack or 3-Pack includes a Pocket Bra and lets you compare sizes side by side.

Will these sizers show me how my implants will look?

No. Oumènta sizers show external volume under clothing. They can't reproduce implant placement, tissue response, implant profile, or surgical results.