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How To Measure For Your First Bra

One of the biggest decisions you make as a teenager is choosing your first starter bra. Here’s everything you need to know to make the right choice.

Everything from choosing the design and colour to measuring your first bra size is exciting. However, you might be unsure of how to find your bra size and feel too awkward to talk to someone about it. If this is the case, we’re here to guide you through choosing and measuring your first bra.

How to measure for a first bra

If you’re wondering how to buy your first bra and get the right size, consider this your bra measuring guide. All you need is a measuring tape to find your perfect fit. Alternatively, head to your local shop and ask a qualified bra adviser to measure you for your bra.

Keep in mind that bra sizes in the UK are calculated in inches, even though we typically use centimetres for this sort of thing.

Step 1: Band measurement

Using a tape measure, measure under your bust, directly under where your breasts start to protrude. This underbust measurement will be your band size. Bra band sizes go up in increments of 2 inches, so this measurement will be an even number, like 32, 34, 36, and so on.

Step 2: Bust measurement

Then, measure your bust over the fullest part of your breasts. Make sure the tape measure isn’t too tight. This will give you a comfortable bust measurement.

Step 3: Calculate

Subtract your band size from your bust size. The difference in inches corresponds to your cup size. Each inch difference equals a different cup size. For example, a 1-inch difference is an A cup, 2 inches is a B cup, and so on.

For example, if your band size is 32 inches and the fullest part of your bust measures 34 inches, the difference is 2 inches, making you a 32B.

If you’re unsure of how to measure bra size for the first time, head to your local shop and ask a qualified bra adviser to measure you for your first bra size. At a professional bra fitting, an expert takes your measurements and suggests the right-sized bra for you.  

How do bra sizes work?

In the UK, bra sizes consist of two components: a band size and a cup size. The band size is a number corresponding to the measurement around the ribcage just under the bust. The cup size is represented by letters and indicates the difference between the band size and the measurement around the fullest part of the bust.

Remember, sizing may vary between lingerie brands, so it's advisable to try on bras and be open to adjustments in size or style for the best fit. Many lingerie stores offer professional fitting services to help find the perfect bra for your body shape.

What are the different types of bras?

Searching for your first starter bra can be intimidating. There’s a variety of shapes, sizes and styles out there. Fortunately, we’ve put together this bra guide to help you make the right choice.

Training Bra

Training bras

Training bras are designed to be your first bra so wearing one is a great way to get used to having a bra on – it can feel pretty strange at first, but you soon get used to it! 

The design of training bras is quite versatile, so if you don’t accurately measure your first bra size, that’s totally fine. Training bras provide light support, modest coverage, and comfort, so if you aren’t ready for a cupped bra yet, a training bra should be just right for you.

Soft Bra

Non-wired bra or soft bra

Non-wired or soft bras have cups that give you shape and support. These are another great starter bra for 11-year-olds, being ideal if your breast buds are starting to develop further and you need a little more support.

Underwire Bra

Under-wired bra

An under-wired bra has a wire underneath each cup to give the bust more shape and support. These are best when your breasts are already quite developed because if the wires dig into your breasts while they’re still maturing, they may impact breast shape and growth. 

When it comes to under-wired bras, it’s really important that the wires on the torso, underneath the breasts and never touch the breast tissue, so you may want to wait a while before you get one of these.

Sports Bra

Sports bra

As your breasts grow, they may start to bounce or move while you exercise, which can be uncomfortable and even painful. Sports bras help reduce the movement of your breasts during exercise and make you feel more comfortable and supported. 

Wearing a sports bra for exercise also protects the ligaments that support the breasts. If you’re on the hunt for your first set of bras and you enjoy an active lifestyle, a sports bra is a must.

Padded Bra

Padded bra

A padded bra gives more shape to your breasts, making them seem fuller. If you are self-conscious about having smaller-sized breasts, a padded bra is a great confidence booster. But remember, all body types are normal and beautiful!

Strapless Bra

Strapless and multi-way bra

Strapless bras work in the same way as a regular bra and let you remove or adjust the straps. This is useful when you're wearing a top or dress and you don't want your bra straps to show, especially if you don’t want strap tan lines!

What is a training bra?

A training bra is a type of bra designed for young girls who are just beginning to develop breast tissue, typically between the ages of 8 and 14. They’re usually a lightweight, unlined design with soft cups. Training bras often resemble crop tops.

The purpose of a training bra is to provide you with support and coverage as you start to grow breasts. It's important to remember that a training bra is not meant to enhance or alter the shape of your breasts, but rather to provide a comfortable and secure fit.

You might find that as you go through puberty and start to develop breast tissue, your breasts can be sensitive or tender. Wearing a training bra can help alleviate some of this discomfort by providing a layer of padding or fabric between the skin and clothing. They also help you get used to wearing bras to make the transition easier.

Training bras come in a variety of styles and materials, including cotton, nylon, and spandex. Some have adjustable straps and hooks in the back, while others are simply stretchy and pull over the head. It's important to choose a training bra that fits properly and feels comfortable, as an ill-fitting bra can cause discomfort and pain.

Why the right sized bra matters

Wearing the right-sized bra is crucial for comfort, breast health, posture, confidence, and preventing discomfort and pain. An ill-fitting bra, whether too tight or too loose, can cause discomfort, and back, shoulder or neck pain. A bra that’s the wrong size can also restrict movement, cause poor posture and potentially lead to skin irritation. So finding the right-sized bra isn’t just a fun milestone, but an important health matter.

A well-fitted bra provides proper support to maintain the natural shape of the breasts, which is important during teenage development. It also contributes to good posture, supporting the chest and upper body for overall musculoskeletal health. Additionally, wearing a bra that fits well enhances confidence, an important factor during the challenging teenage years.

Bra fitting problems

At some point, you might find yourself asking, ‘Does my bra fit correctly?’ If you’re unsure, there’s an easy way to tell if your bra doesn't fit properly. Simply put it on and look in the mirror to check for the most common fit problems:

  • Creased or baggy cups: try a smaller cup.
  • Red marks on your shoulder: you may need to loosen the straps a little. If doing this makes the cups baggy, then you may need to go down a size.
  • Wired section of an under-wired bra lifts away: if the wires dig into your sides or sit on your breasts and not underneath them, your cup size might be too small and you should try going a larger cup size. The middle between the cups should rest flush on your sternum.
  • Spilling out of the cups: they’re too small. A well-fitted bra should lie flat on your breasts and almost two-thirds should be covered. To check this out, put on a t-shirt and turn to the side. If you see a line where your breasts fall over your cup, you need a bigger size.

Remember, the band around your body should be in line with the wires at the front of your bra and if not, you may need a bigger back size. Or you could try the other hooks on the back of the bra, remembering that the hooks closest to the end of the strap are the loosest.

Proper measuring for your first bra is very important to make sure you have the right size as an ill-fitting bra is not only useless at supporting your breasts, but is likely to make you feel rubbish. A well-fitting bra is like a best friend: supportive, comfortable and makes you feel good about yourself!

It can be tricky finding the right bra size the first time around, so remember to be gentle with yourself. In time, you’ll soon know how to measure for a first bra and you’ll get the hang of bra sizing!


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