Lingerie buying guide

Hints and tips to help you find lingerie that looks and feels great and fits you perfectly
Two women relaxing on a bed wearing neutral-toned lingerie
Two women relaxing on a bed wearing neutral-toned lingerie

How to measure yourself

Band sizing

Your clothing size in tops roughly equates to your band size, with some exceptions.

T-shirt size81012141618202224

Bra size

28

30

32

34

36

38

40

42

44

Cup sizing

SmallAverageFullFullerVoluptuous

A - C

D - DD

E - F

FF - G

GG - K

Using the bra you’re currently wearing, you should be able to tell if you need to go up or down a band or cup size. For example, if you’re wearing a 36C and it appears two back sizes too large and the cup looks fine, go down to a 32 and increase the cup size to a DD - although the cup letter changes, the volume remains the same. Similarly, if you’re wearing a 32F and the back is too tight, go up to a 34 back and down to an E cup; again the cup volume doesn’t change although the letter does. 

You can also use the size matrix below to help you; your corresponding sizes, sometimes known as your ‘sister sizes’, will be the options directly to the right and left of your current size. 

Sister size chart

283032343638404244

28AA

28A

30AA

28B

30A

32AA

28C

30B

32A

34AA

28D

30C

32B

34A

36AA

28DD

30D

32C

34B

36A

38AA

28E

30DD

32D

34C

36B

38A

40AA

28F

30E

32DD

34D

36C

38B

40A

42AA

28FF

30F

32E

34DD

36D

38C

40B

42A

44AA

28G

30FF

32F

34E

36DD

38D

40C

42B

44A

28GG

30G

32FF

34F

36E

38DD

40D

42C

44B

28H

30GG

32G

34FF

36F

38E

40DD

42D

44C

28HH

30H

32GG

34G

36FF

38F

40E

42DD

44D

28J

30HH

32H

34GG

36G

38FF

40F

42E

44DD

30J

32HH

34H

36GG

38G

40FF

42F

44E

30JJ

32J

34HH

36H

38GG

40G

42FF

44F

30K

32JJ

34J

36HH

38H

40GG

42G

44FF

32K

34JJ

36J

38HH

40H

42GG

44G

34K

36JJ

38J

40HH

42H

44GG

36K

38JJ

40J

42HH

44H

38K

40JJ

42J

44HH

40K

44J

How your bra should fit

Back view line drawing of a bra with adjustable straps and hook-and-eye clasp, illustrating lingerie fit and support

Underband

  • Should feel firm

  • Should sit flush against ribcage and parallel all the way around your body

  • Should be able to comfortably fit two fingers under the band

Line drawing of a woman wearing a grey underwired bra with adjustable straps, showing fit and support shape

Cups

  • Breasts should sit within the cups perfectly

  • Should look smooth with no bumps, ridges or flat spots

Illustration of a woman wearing a grey full-coverage underwired bra, showing supportive cups and straps detail

Wire

  • Should fully encompass breast tissue

  • Should sit flat against ribcage

Illustration of a woman wearing a supportive grey bra, showing strap, cup shape and underarm fit detail

Straps

  • Should sit snugly against the shoulder

  • Should be able to comfortably fit two fingers under the straps

Common fit problems

#

Underband

  • The band rides up when you lift up your arms; consider going down a back size.

  • The band digs in and feels tight; consider going up a back size.

Illustrated bra fitting guide showing how to scoop and adjust breast tissue for better support and shape

Cups

  • Breasts spill out of the cups at the front and/or sides; consider going up one cup size.

  • Cups have excess fabric; consider going down a cup size.

Diagram showing how to adjust a bra for better fit, lifting and centring breasts with strap and cup support arrows

Wire

  • Bust drops beneath wires when you lift up your arms; consider going down a back size.

  • Centre of bra stands away from breastbone; consider a different bra style.

Two-panel bra fitting diagram showing strap adjustment and shoulder placement with pink arrows for support guidance

Straps

  • Straps dig in; consider going up a cup size and down a band size.

  • Straps slide off; consider going down a cup size and up a band size.

Bra styles

A model wearing a black bra featuring lace detailing and adjustable straps, against a plain background.

T-shirt bra

This is a smooth cup bra which can be padded, non-padded or moulded. A classic everyday bra that's great if you want fluid contours and minimal detailing.

Woman wearing a sleek black strapless bra with thin straps, showcasing a seamless design against a white background.

Balcony bra

Wider-set straps and a lower profile, good for low or sweetheart necklines. It offers uplift without cleavage and is great for broader shoulders and a fuller bust.

A woman models a black underwired bra with ribbed detailing and adjustable straps against a white backdrop.

Full cup bra

Offering all-over coverage and full support, this type of bra is really versatile and suits all bust shapes; it’s especially good for larger busts.

Model wearing a sleek black plunge bra.

Plunge bra

Low center front and a v-shape cup profile. Good for low cut and v-neck tops and gives subtle uplift and cleavage. Suitable for a narrower frame and close cleavage.

Woman modelling a black padded plunge underwired bra with adjustable straps, front view on a white background

Push up bra

With angled padded cups to push the bust together, this type of bra is good for creating uplift and cleavage.

Model wearing a black strapless balconette bra with smooth moulded cups, shown in a studio close-up on white background

Strapless and multiway bra

This style might feature no straps or, it may come with straps which are either removable or changeable; good for wearing under strapless or one shoulder tops and dresses.

Woman wearing a black Sloggi wireless bralette, seamless soft-cup lingerie with adjustable straps on white background

Non-wired bra

This bra style contains no wires; it can be padded or non-padded. Comfortable and easy to wear, this is an ideal style for first, nursing or post-surgery bras.

Close-up of model wearing black padded plunge bra with lace side panels, supportive fit on white background

Wired

Fitted with wire under the cups; this style lifts, separates and defines the bust, while simultaneously providing additional shape and support.

Specialist bras

Larger cup sizes (DD+)

Bras for larger cup sizes have enhanced features to support the bust:

  • The underband is usually wider, as this is where most of the bra’s support comes from.

  • Hook and eye straps are usually deeper to reduce pressure on shoulders.

  • Straps tend to be slightly wider to distribute weight on the shoulders more evenly and comfortably. 

  • Underwire will feel firmer; the cup may be constructed using a multi-panel design for better support.

We also offer a range of non-wired bras in larger cup sizes which provide a more relaxed fit with a good level of support.

Sports bras
Woman modelling black seamless sports bra with thin straps, supportive fit and smooth finish

Low impact

  • Great for yoga, Pilates, walking and any activity that causes minimal bounce. 

  • Usually crop styles designed for comfort & support, allowing you to stretch and move.

  • If you’re a DD+ you may find it more comfortable to move up an impact.

Model wearing black Under Armour sports bra with adjustable straps and branded elastic underband

Medium impact

  • These bras have more structure and shape, providing additional support.

  • Good for activities such as spinning and dance.

Close-up of woman wearing black high-impact sports bra with supportive straps, ideal for running and gym workouts

High impact

  • Fully structured styles which can be wired or non-wired.

  • Designed using performance fabrics, seaming and compression to provide high levels of support.

  • Hook and eye straps are usually padded for additional comfort.

  • Suitable for activities such as tennis, netball and horse riding.

First bras

We offer a selection of soft, non-wired bras which are recommended for younger customers to protect their delicate breast tissue as it grows. As the bust can develop quickly at this age, regular fittings are recommended. Our professional fitters can measure over T-shirts and customers are welcome to bring a female family member or friend with them to the fitting.

Maternity and nursing bras

During pregnancy you’ll need extra support as your breasts grow and your ribcage expands. We advise having a fitting each trimester, with a final fitting scheduled at around 30 weeks. At this point we can fit you for a nursing bra, if needed, and offer guidance for the months ahead.

Nursing bras have clips on each strap that are easy to open with one hand, allowing quick access when breastfeeding. Cups are more spacious to allow room for breast pads and for fluctuations in breast size.

We also offer a range of non-wired bras which offer comfort and support during the night or in between feeds.

Post surgery bras

If you’ve recently had breast surgery, you may have sensitive scar tissue, swelling and tenderness, so it’s important to find a correctly fitting bra that offers both comfort and support. We aim to put you at ease; our skilled fitters are specially trained to understand the needs of women who have undergone breast surgery and can help you find the right bra to make you feel comfortable and confident.

Please book an appointment before you visit to ensure a specialist fitter is available.
Pre and post op

Immediately after treatment you may experience reduced movement and swelling, meaning a well-fitting bra is essential to your comfort. We recommend:

  • Bras that are seam free and non-wired to avoid irritating sensitive areas.

  • Front fastening bras or bras with drop cups for ease of dressing.

  • Stretchy, supportive and breathable fabrics which can assist with your healing.

  • Styles that come up high under the arm and deep below the bust to provide a secure, comfortable fit.

Prostheses and reconstruction

The effects of surgery and treatment can take some time to settle. You might be given a temporary cotton prosthesis until you’re ready for a permanent one. Permanent prostheses are measured by weight rather than cup size and are available in a range of shapes and weights. You can also get specialist prostheses for strapless bras and swimwear. When being fitted for a prosthesis, we suggest wearing a non-padded bra to allow your consultant to accurately assess your shape.

After your operation, it’s recommended that you continue to wear non-wired, soft bras, preferably without seams, until any swelling and scarring has healed. We offer a range of post-surgery bras from Royce that are specially adapted. They have pockets, deep under bands and wings, and wider straps.

Long-term recovery and beyond

Even after your scarring has healed and swelling has reduced, you may wish to continue wearing non-wired or specialist bras. Everyone is different, and as long as your natural breast and prosthesis are well supported you can wear any style you choose. In general, full cup bras can help cover scarring and bras with stretch lace, elastic or trims are good for supporting a prosthesis.

If you feel ready to wear an underwired bra, opt for one that is fitted to the natural breast. You may also wish to consider styles with soft wires, which are more flexible and can move with the body. Where possible, try to avoid seams or firm joins, which can rub on sensitive scar tissue and may cause discomfort.

Post surgery fitting and what to expect

Being fitted following surgery is similar to other fittings; we offer this service in all of our shops (except for John Lewis at Home shops). Our expert fitters are specially trained to put you at ease. We’ll start by asking what type of surgery you’ve had and what advice you’ve been given by your breast cancer nurse. We’ll then measure you and assess your size to help you find a bra that is supportive and comfortable. You can book an appointment online, via the phone or by visiting us in-store; one of our experienced fitting Partners will be happy to assist you. Below we’ve provided answers to some frequently asked questions:

How long will it take?

The fitting may take a little longer than normal as we’re committed to finding the right bra for you.

When can you fit me?

We can fit you for a bra immediately after surgery and in the first few months of your recovery, before you’re fitted for a prosthesis.

How will it feel?

Non-wired post-surgery bras will feel firmer than wired styles because the material used to make them needs to provide you with robust support. You may be a different cup or band size than you're used to as each bra style and brand fits slightly differently.

How will you measure me?

We will always fit the bra to your natural breast to ensure you’re well supported. If you’ve had a double mastectomy we’ll fit the bra to your underband measurement and the prosthesis. If you’ve had reconstruction surgery, we’ll fit to the larger breast. We can measure and assess your size with your bra on or off - our priority is to make you feel as comfortable as possible. If you have limited mobility due to the type of surgery you’ve had, our Partners are there to help.

Do you have private changing rooms?

Our shops have individual, private fitting rooms; some shops also have discreet, larger fitting rooms specifically for post-surgery appointments. Please ask one of our lingerie Partners in your local shop about the fitting facilities.

VAT exemption

If you’ve had a mastectomy or partial mastectomy, you’re eligible for VAT exemption on the cost of any product specifically manufactured as mastectomy wear.  

  • All pocketed post-surgery bras, such as the Royce range, are automatically exempt from VAT.

  • If you choose a standard bra and have a pocket fitted for a prosthesis, you can claim back VAT by completing a VAT Exemption form.

  • The cost of having a pocket created is also exempt from VAT.

  • Please note, if you choose to buy a standard non-wired bra and do not have it altered in any way, the product will not be exempt from VAT.  

If you purchase a bra from us in store, our Partners can guide you through the process of claiming VAT back. If you buy from us online, please contact our Customer Services team on 03456 100 344.

Lingerie fitting appointments

Your bra size changes at different stages of your life. So our free fitting service is the perfect opportunity to find the bra that's right for your shape and size today.

Our expert bra fitters will measure your body accurately to achieve the best fit. They can advise on all kinds of bras, including first, maternity, nursing and post-surgery bras, as well as shapewear and swimwear. We offer four types of lingerie fitting appointments. You can book online using the link below, or in our shops at the lingerie department.

Knicker styles

Model wearing black high-waisted briefs

Full brief

Sitting comfortably across your hip and waist, this style provides full coverage and comes in a range of rises for easy, everyday wear.

Model wearing black high-waisted  briefs, worn with black tank top

Shorts

A tomboy style that mimics the look of men’s briefs. Features a low, straight cut on the leg with good coverage and a smooth silhouette.

Woman modelling black seamless hipster briefs underwear

Hipster

This is a sportier style that sits low on the hips, has a gently curved cut and is great for creating a seamless look.

Model wearing black seamless knickers

Bikini

Like the name suggests, this high leg, low-rise style is cut similar to classic swimwear and provides comfortable coverage.

Back view of a female model wearing black seamless brazilian briefs

Brazilian and tanga

Brazilian knickers sit low on the hip and feature a cut-away back; Tanga styles have a string waistband and offer similar coverage to bikini bottoms.

Rear view of model wearing black thong underwear, showcasing seamless fit and minimalist lingerie design

Thong and string

Thongs are cut with a high leg and low-coverage back; string knickers create a ‘barely-there’ look with minimal fabric. Both are ideal for wearing under figure-hugging outfits.

Choosing shapewear

Find the right solution for a streamlined silhouette, with different levels of support

Light

This level is gently smoothing and great for everyday shaping

Firm

This level is supportive and sculpting and is great for a night out or all-day events

Extra firm

This level is the most transformative and is great for that extra special occasion or shorter events

Types of shapewear

Model wearing black shapewear slip dress with built-in bra, sheer mesh panels and tummy control

Slips and bodies

Slips and bodies are designed to shape the tummy and hips, smoothing the silhouette from bust to hips or knee. They can come with padded or underwired cups; some are cut to enable you to wear your own bra. Slips and bodies are perfect for wearing under figure-hugging dresses.

Model wearing black high-waisted shapewear briefs with tummy control and sheer mesh leg bands

Briefs and waist cinchers

Shaping briefs and waist cinchers smooth your waist and hips; they also support and flatten your tummy and emphasise your waist for an hourglass figure. These are great for wearing under tailored outfits, skirts, trousers and dresses.

Women’s black high-waist seamless shaping shorts, mid-thigh length tummy control underwear on model

Thigh slimmers

Thigh slimmers provide support from the waist down to the mid thigh/knee. They smooth your tummy, hips and thighs and can shape your rear. These styles are versatile and work well under trousers, skirts and dresses.

How to get the most out of your shapewear

  • Always “step into” your shapewear; this will help to keep the control panels and seams in the correct position on your body.

  • Always buy your actual dress size. If your shapewear is too small it will roll up or dig in; the correct size will flatter and sculpt your figure.

  • Different outfits or problem areas may require different styles of shapewear as well as varying levels of support to ensure a smooth finish under clothing. 

  • Build up your shapewear options to ensure you have the right piece for every outfit or occasion.

  • To ensure longevity, always follow wash care instructions and do not tumble dry your shapewear.

Owning lingerie

Tips to look after your lingerie

Do's

✔ Try to alternate your bras and avoid wearing the same bra for more than two days in a row

✔ Always wash your lingerie according to the garment care label

✔ Close all fastenings before washing to avoid snagging

✔ If you can machine wash, do so at a low temperature and on a delicate cycle. Use a lingerie bag when washing by machine

✔ Dry bras flat so they don’t stretch and retain their shape

Don'ts

✘ Tumble dry your bras or shapewear or use an iron on them

✘ Twist or wring your bras when drying as this could damage the cups and underwires

✘ Use clothes pegs on bra cups as this can distort the foam

✘ Dry lingerie on a radiator