425cc vs 450cc Breast Implant Sizers

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

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

Choose your Pocket Bra by your current band size:

Because this kit includes sizes above 400cc, we recommend Small (S) rather than Extra Small (XS) if your band is 32" or smaller.

The Pocket Bra should feel snug and supportive, similar to a sports bra. A steady fit keeps both sizes in the same position, which matters when only 25cc separates them.

Leaning a Little Smaller? Compare our 400cc vs. 425cc 2-Pack or our 375cc vs. 425cc 2-Pack.

Leaning a Little Larger? Compare our 450cc vs. 475cc 2-Pack or our 450cc vs. 500cc 2-Pack.

Want a More Noticeable Difference? Our 400cc vs. 450cc 2-Pack and 425cc vs. 475cc 2-Pack each compare two sizes 50cc apart.

Want a Third Size? Explore our 400cc vs. 450cc vs. 500cc 3-Pack or our 350cc vs. 400cc vs. 450cc 3-Pack, or build a custom kit with 425cc, 450cc, and 475cc. You can also choose any two volumes with our Choose-Any-2 Sizer Kit.

425cc vs. 450cc Breast Implants: How Different Are They?

450cc has 25cc more volume per breast than 425cc. That's about 6% more sizer volume, or roughly 1.7 tablespoons per side.

That doesn't mean your breasts will look 6% larger. The percentage describes the volume of the sizer, not your overall breast size. How either volume looks on you depends on your existing breast tissue, chest width, and frame, and after surgery also on implant profile and placement.

Why Knowing Your Upper Limit Helps

Many women go into a consultation with a size they like but no clear sense of their limit. Knowing the most you'd be happy with gives your surgeon a useful boundary. If 450cc still feels right, you know your comfort zone reaches at least that far. If 425cc already feels like your limit, that's just as valuable.

At the upper end of the range, measurements such as chest width and the amount of existing breast tissue often play a bigger role in your surgeon's recommendations. Your upper limit is your preference. Your surgeon will help you decide what's appropriate for your body.

The Video Test

Still photos can't show everything. Take a short video in each size: walk toward the camera, turn to the side, and walk away. Movement shows how a size looks as part of your whole body, not just in a single pose.

Use the same setup. Same outfit, same room, same lighting, and the camera at the same height, ideally a few feet away.

Watch them back to back. Play the two videos one after the other. Notice which one looks like the version of yourself you want to see.

Watch them again the next day. A fresh look often confirms or changes your first reaction.

Bring your videos and notes to your consultation. They give your surgeon a fuller picture of the look you prefer.

If Neither Feels Quite Right

If 450cc doesn't reach your limit, try 475cc. If 425cc already feels like more than you want, compare 400cc. For a wider look at this range, read 350cc vs. 450cc Breast Implants: Which Size Is Right?

Will 425cc or 450cc Give Me a DD Cup?

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.

Explore Individual Breast Augmentation Sizer Sizes

Learn more about our 425cc sizers, 450cc sizers, and 475cc sizers, or try our Breast Implant Size Calculator for a suggested range of sizes to try.

For more about choosing a size, read What Is At-Home Breast Implant Sizing?, What's the Average Breast Implant Size?, and How to Choose the Right Breast Implant Size, or browse our full Breast Implant Sizing Guide.

How much bigger is 450cc than 425cc?

450cc has 25cc more volume per breast, about 6% more than 425cc. The visible difference is usually subtle and most noticeable in fitted clothing and from the side.

How do breast augmentation sizers help me find my upper limit?

Wearing two close sizes near the top of your range shows you where your comfort zone ends. That gives you and your surgeon a clear boundary to work within.

Which Pocket Bra should I choose if my band is 32" or smaller?

Choose Small (S). Because this kit includes sizes above 400cc, we recommend Small rather than Extra Small for bands of 32" or smaller.

Should I get 425cc or 450cc 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.

Why buy a 2-Pack instead of a 3-Pack?

If you've already narrowed your choice to 425cc or 450cc, a 2-Pack focuses on just those two sizes, at a lower price. If you're still exploring, a 3-Pack or custom kit adds a third size for a wider comparison.

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.