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Key points

Bigger breasts with a balanced shape start with balance with your body. Your cup size needs to suit your chest base width, your shoulders and your height.
Eating a healthy diet, massaging and caring for your skin, and exercising your chest muscles help look after your skin and how your chest looks, but they cannot directly increase your cup size.
Silicone breast implants and fat transfer using your own fat are medical options for increasing breast size. Choose a size that suits your body, so it does not put a strain on your body over the long term.
Breast augmentation with silicone implants using the Seamless technique, which closes the wound with medical skin glue, helps keep the scar small, and you do not need stitches removed.

The size and shape of the breasts are part of what gives your body proportion and definition. If you want bigger breasts, or a fuller upper chest, you may start by looking at ways to care for yourself, such as your diet, exercise and changes to your daily routine. At the same time, you may wonder how much these methods without surgery can really increase breast size, or whether you need a medical procedure.

In this article, S45 Clinic brings together information on caring for your breasts and increasing their size, from understanding how breasts develop and the nutrients that support breast health, to breast augmentation surgery options. This information can help you decide if you are thinking about changing your body proportions.

What Makes Breasts Get Bigger? Body Factors That Cause Breast Growth

Infographic in Thai on 2 factors that cause breast growth, with cross-section drawings of the breast: (1) hormones at different life stages, as oestrogen stimulates the breast glands and the breasts change with periods and pregnancy, and (2) fat and genetics, as genetics set the chest base width and fat changes with body weight. The caption says these factors work together according to each person's body

Changes in breast size, or breasts getting bigger, come from your hormones working together with your genetic proportions. The breast is not made only of milk glands. It also contains fat and blood vessels that respond to hormone levels at each stage of life, which makes the breasts grow or change over time.

How Oestrogen Affects Breast Changes at Different Ages

The hormones oestrogen and progesterone control breast growth. From puberty, these hormones signal the milk ducts and breast glands to develop, so the breasts start to take shape and grow as part of normal development.

During your period, changing hormone levels make the breast tissue hold more water, which may make your breasts feel full and tight for a short time. During pregnancy and breastfeeding, the milk glands get bigger to prepare to make milk, and they gradually go back to their usual size after you stop breastfeeding.

Fat Under the Skin and Your Genetics

Your genetics are one of the factors that set your chest base width, the position of your breasts and how your cells respond to hormone levels. People whose genes favour storing fat in the chest area are more likely to have fuller breasts.

The fat under the skin around the breasts also changes in volume with your body weight. When you gain weight, the amount of fat across your body, including the breasts, goes up too. If you are looking into how to make your breasts bigger, you may find that eating enough energy and keeping a healthy body weight can help your breasts look fuller to some extent.

What Cup Size Counts as Big Breasts? How to Measure Your Bust and Find Proportions That Suit You

Whether big breasts suit you does not depend only on the cup letter. The assessment looks at the overall balance between your breasts and your back, your shoulder width and your height, so your proportions match your existing body shape.

How to Work Out Your Cup Size From Your Bust and Underbust Measurements

To work out your cup size, start by using a tape measure to measure around the fullest part of your bust and around your underbust, in centimetres. Then take the underbust measurement away from the bust measurement. The difference shows your cup size. The bigger the difference, the bigger the cup size.

The number of centimetres for each cup size differs between countries’ sizing standards and between bra brands, so check the size chart of the brand you choose and try the bra on as well. Measuring correctly helps you know your actual size and choose bras that fit your body.

Assessing Projection and Proportions That Suit Your Shoulder Width

Balanced breasts should be in proportion with the width of your shoulders and back. If you have a small frame but breasts that are too big, your upper body may look heavy, or your breasts may hide the shape of your waist.

Well-proportioned breast shapes usually have an upper slope that runs gently downward and a lower part that supports the breast tissue in balance. Keeping balance between your bust, waist and hip measurements matters more for your overall look than focusing on cup size alone.

What Foods Increase Breast Size? Foods and Nutrients for Breast Health

Infographic in Thai on 4 groups of healthy foods: (1) soya beans and soy milk, (2) flaxseeds and black sesame seeds, (3) protein from fish, eggs and chicken breast, and (4) avocado, almonds and olive oil. The caption says there is no research yet confirming that they increase breast size

When people ask what foods increase breast size, the answer lies in nutrients that support skin health and the hormone system. Food cannot make fat build up in one particular area, but eating a balanced diet is the basis of good overall health, including the health of the skin on your chest.

Phytoestrogens From Plants, Soya Beans and Soy Milk

Phytoestrogens are compounds found in plants that can bind to oestrogen receptors in the body. They are found in high amounts in soya beans, soy milk, tofu, flaxseeds and black sesame seeds.

Drinking soy milk or eating soya products is part of a healthy diet, but there is no research yet confirming that they increase breast size. In reality, the foods in this group that are often said to make breasts bigger do not directly increase breast size.

Protein and Unsaturated Fats to Help Keep Your Muscles Firm

Protein from fish, eggs, chicken breast and beans helps build and repair collagen fibres under the skin. When combined with exercise, it also helps strengthen the chest muscle (pectoralis major).

Unsaturated fats from avocado, olive oil and almonds are healthy fats to include in your diet, and they are often described as foods that nourish the breasts. Eating both groups of food is part of looking after your overall health, but it does not make fat build up in the breasts in particular.

How Can I Have Fuller Breasts? Ways to Make Your Breasts Bigger Without Surgery

If you are wondering how to have fuller breasts, there are several methods without surgery that can help change how your chest looks. These methods do not directly increase the volume of the breast glands, but they can help firm the muscles under the breasts and make your shape look more balanced.

Exercises for Your Chest Muscles

Infographic in Thai on 3 chest exercises: (1) push-ups, 3 sets of 10 to 12, (2) the dumbbell chest press, pushing the dumbbells straight up, and (3) the dumbbell fly, opening the arms and bringing them together. The caption says to practise them regularly 2 to 3 times a week

Exercising the chest muscles can help build up the muscle under the breasts. Exercises that can make your breasts look bigger in an indirect way include:

Push-ups: these work the chest, shoulders and core muscles. Do 3 sets of 10 to 12.
Dumbbell chest press: lie on your back on a bench and push the dumbbells straight up. This helps build the muscle under the breasts.
Dumbbell fly: open your arms out to the sides and bring them back together, to stretch and firm the sides of the chest.

Doing these exercises regularly 2 to 3 times a week is an indirect way to increase your bust size that helps make your chest muscles stronger.

Breast Massage to Boost Circulation and Care for Your Skin

Breast massage can help boost blood flow and the lymphatic system around the breasts. Apply virgin coconut oil or a moisturising cream, then massage in circles from the base of the breast up to the upper chest for 5 to 10 minutes a day. This helps keep the skin moisturised and supple.

Massage cannot make your breasts several cup sizes bigger, but you can use it to keep the skin around your breasts smooth and soft, relax the muscles, and notice any changes in your breast tissue early.

Choosing a Push-Up Bra to Help Your Shape Look Balanced

Wearing a bra that suits your body can change how your figure looks in clothes. A push-up bra with padding at the bottom or sides lifts the breasts into a suitable position, so your cleavage and upper chest are more visible.

If you are looking for a quick way to make your breasts look bigger, choosing a bra with a supportive frame and well-fitting straps helps support the weight of your breasts and brings the tissue under your armpits back into the bra cups. This helps your body look balanced in your clothes.

Improving Your Posture to Open Up Your Chest

Your posture and the alignment of your spine directly affect how big your breasts look. Slouching or rounding your shoulders can make your chest sink in and look flat. Practise standing tall by lifting your chest, drawing your shoulders back slightly and gently tightening your stomach muscles. This helps open up your chest.

Standing and sitting with good posture is a way to make your bust look bigger that you can do every day. It reduces pressure on your neck and back, and helps your body look more shapely overall.

Want Bigger Breasts? How Many Types of Breast Enlargement Surgery Are There?

Infographic in Thai on 3 surgical ways to increase breast size, with cross-section drawings of the breast: (1) silicone breast implants, (2) fat transfer to the breasts (fat grafting), and (3) breast augmentation with a breast lift. The caption says the doctor chooses based on each person's body

When self-care has limits because of your body, surgery is a medical option if you want bigger breasts or a noticeable change in cup size. Doctors currently consider the following methods based on each person’s body.

Breast Augmentation With Medical Silicone Implants

Silicone breast implant surgery uses medical-grade silicone implants. Implants differ in these features:

Surface: implants can be smooth or textured. Each type has different advantages and risks, which the doctor explains before choosing.
Medical silicone gel (cohesive gel): this gel is highly flexible, helps the implant keep its shape, feels soft and flexible to the touch, and lowers the risk of gel leaking if the implant tears.

Choosing medical-grade silicone implants for bigger breasts helps increase breast size according to the plan you agree with your doctor.

Compare brands: Which breast implant brand should I choose? Key facts before choosing a brand and shape

Fat Transfer to the Breasts

Fat transfer to the breasts (fat grafting), or breast augmentation with your own fat, makes the breasts bigger using your own fat cells. Excess fat is removed by liposuction from your stomach, hips or thighs, then processed to separate out purified fat cells, which are injected into the layer under the skin of the breasts.

This method increases breast volume by less than silicone implants. It is usually considered for people who already have a fair amount of breast tissue and want balanced proportions.

Breast Augmentation With a Breast Lift

If your breasts also sag, for example after having a baby or after losing a lot of weight, implants alone may not be enough to reshape your breasts. The doctor may then recommend a breast lift together with implants.

This technique removes excess skin, moves the areola (the darker skin around the nipple) and the nipple to a suitable height, and then places implants to add volume and fullness. It is an approach that helps make the breasts bigger while also restoring their shape.

What Implant Size in CC Should You Choose so Your Breasts Do Not Look Too Big for Your Frame?

Breast augmentation for bigger breasts, or changing breast size, is not about choosing the highest cc number. It is about working out the proportions that suit your body, so your breasts suit the width of your torso and do not put a strain on your skin over the long term.

Measuring Your Breast Base Width and Skin Thickness

The assessment before increasing breast size includes measuring the width of your breast base (breast base width, BW) and checking the thickness of the fat layer under the skin. If you choose an implant with a diameter wider than your breast base, the edges of the implant may spill out to the sides or sit too close to the middle of your chest.

Skin elasticity is another factor in choosing a suitable cc volume. If you have little breast tissue but choose a cc size that is too big, your skin may become very tight, and you may be able to feel folds in the implant. The doctor therefore needs to assess you in detail to choose a size that suits each person’s body.

Check the size that suits your body: Preparing for 400cc breast implants, which body types suit them, and precautions

The Difference Between Round Implants and Implants That Change Shape With Your Position

Infographic in Thai on 2 shapes of breast implants, with cross-section drawings of the breast: (1) round implants, which are symmetrical on all sides and add volume to the upper breast, and (2) implants that change shape with gravity, which slope when you stand and spread out to the sides when you lie down. The caption says to choose based on your body and lifestyle

The shape of the implant directly affects the shape of your breasts. Round implants are symmetrical on all sides. They add fullness and volume to the upper breast and help fill out your cleavage.

Some implant models are designed to change shape with gravity. When you stand, they slope in a way similar to the shape of breast tissue, and when you lie down, they spread out to the sides. Choosing an implant type therefore depends on your goals for your proportions and on your daily life.

What Problems Can Breasts That Are Too Big Cause?

Infographic in Thai on 4 effects of breasts that are too big: (1) aching in the neck, shoulders and shoulder blades, (2) strain on the spine, (3) bra straps pressing grooves into the shoulders, and (4) damp, irritated skin under the breasts. The caption says to choose a size that suits your body

Many people may want bigger breasts, but breasts that are bigger than your body can support can affect your health and your daily life.

Strain on Your Neck, Shoulders and Spine

Heavy breasts may pull your body forward all the time, so the muscles of your neck, shoulders and shoulder blades, and your spine, have to work hard to keep your body balanced. This may lead to long-term muscle aches.

Bra straps carrying a lot of weight may also press on your shoulder muscles and leave deep grooves. The skin under the breasts, where it presses together, is also more likely to become damp, red and irritated from sweat.

How to Choose an Implant Size That Lets You Move Easily Over the Long Term

Planning breast augmentation means balancing good proportions with ease of movement in your daily life. Choosing an implant size with a weight that suits your body helps you move and exercise easily.

Your doctor assesses you and advises on a suitable cc size, to fill out your curves in line with your body without putting a strain on your bones and muscles.

Why Choose S45 Clinic for Breast Augmentation?

Surgery for bigger breasts needs a proper assessment and ongoing care. At S45 Clinic, we focus on analysing your body to design a breast shape that suits each person.

Individual Breast Shape Design to Suit Your Body

The doctor measures your chest base width, assesses your skin thickness and analyses your overall proportions, to choose the cc size, shape and type of implant that suit what you want and your daily life.

The implant position is decided for each person, either under the chest muscle (pectoralis major) or above the muscle, so the implant fits with your existing tissue, lowers the chance of rippling (folds in the implant showing through), and keeps your proportions balanced as you move.

Small Incisions With the Seamless Technique and Ongoing Checks as Your Implants Settle

S45 Clinic uses the Seamless technique, which uses medical skin glue to close the surgical wound without stitches on the outside of the skin. The wound is therefore small, and after the procedure you can shower as advised, without needing stitches removed.

After surgery, the clinic has follow-up appointments to check how your skin recovers and how the implants settle, and gives advice on how to look after yourself after breast augmentation.

Frequently Asked Questions About How to Get Bigger Breasts

How Much Can Methods Without Surgery Help Me Get Bigger Breasts?

Self-care, such as eating a healthy diet, exercising your chest muscles and massage, can help firm your skin and keep it supple, but it cannot noticeably increase your cup size. If you want to go from a small cup size to a big one, breast augmentation changes your size more noticeably, but it carries the risks of surgery. Before deciding, find out whether breast augmentation is dangerous and talk to a doctor.

How Much Can Breast Massage or Creams Make My Breasts Bigger?

Massage with a moisturising cream helps boost blood flow and moisturise the skin, which makes the skin around your breasts look firmer for a while. However, creams applied to the skin cannot go deep enough to increase milk gland tissue or create new fat.

Can Foods That Increase Breast Size Change My Cup Size From A-Cup to C-Cup?

Food cannot make fat build up only in the breasts. Going from an A cup to a C cup needs a large increase in volume, so food alone cannot do it, unless you gain a lot of weight all over your body.

How Long Is Recovery After Breast Augmentation for Bigger Breasts, and How Do I Look After Myself?

If you are wondering how many days recovery after breast augmentation takes, you need at least 7 days to recover. When you can go back to work that does not involve heavy physical effort depends on your doctor’s assessment, and the wound heals gradually depending on each person’s body. Follow your doctor’s advice and wear a support bra 24 hours a day for the first month, which answers how long to wear a support bra after breast augmentation. Do not lift anything heavier than 3kg, and avoid sleeping on your front.

How Long Do Large Breast Implants Last?

Breast implants do not have to be replaced after a set number of years, but they are not devices that last for the rest of your life. How long they last depends on how each person’s body reacts. Have regular ultrasound scans or see your doctor for check-ups from time to time.

Summary

Bigger breasts should mainly be in balance with your body. A breast size that suits the width of your shoulders and torso helps your body look in proportion. You can start with self-care through a healthy diet, chest exercises and good posture.

If you are interested in surgery to increase breast size directly, choosing a size that suits your existing chest base is an important factor in getting suitable proportions that do not put a strain on your body. A consultation and assessment with your doctor helps you get a shape that suits your body.