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Size 40B Bras

Also labeled UK 40B and EU 90B

Our 40B bras include T-shirt, plunge and strapless styles, with front-closure and wire-free options offering different cup surfaces and constructions to compare across the collection. Look for cups that follow you without gaps or pressure, a band that remains level and straps that rest comfortably as you move. For help with your measurements and starting size, use our Bra Size Chart.

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35 products

Wacoal Red Carpet Strapless Bra 854119 Nude
Wacoal
Wacoal Red Carpet Strapless Bra 854119 - Natural Nude Sale price$78.00
Montelle Pure Plus Full Cup T-Shirt Bra 9320 Sand/Sable
Montelle
Montelle Pure Plus Full Cup T-Shirt Bra 9320 - Sand Sale price$69.00
Montelle Pure Plus Full Cup T-Shirt Bra 9320 Black Front
Montelle
Montelle Pure Plus Full Cup T-Shirt Bra 9320 - Black Sale price$69.00
Lunaire Versailles Full Coverage Seamless Wire-Free Bra 13214 Black Front
Lunaire
Lunaire Versailles Full Coverage Seamless Wire-Free Bra 13214 - Black Sale price$44.00
Montelle Mysa Cup-Sized Bralette 9335 Champagne
Montelle
Montelle Mysa Cup-Sized Bralette 9335 - Champagne Sale price$59.00
Wacoal Back Appeal Wire Free Bra 852303 Rose Dust
Wacoal
Wacoal Back Appeal Wire-Free Bra 852303 - Rose Dust Sale price$72.00
Montelle Mysa Cup-Sized Bralette 9335 Black
Montelle
Montelle Mysa Cup-Sized Bralette 9335 - Black Sale price$59.00
Simone Perele Confiance Plunging Padded Bra 12K363 Black Front
Simone Perele
Simone Perele Confiance Plunging Padded Bra 12K363 - Black Sale price$85.00
Elila Lace Strapless Longline Bra 6621 Black Front
Elila
Elila Lace Strapless Longline Bra 6621 - Black Sale price$89.00
Elila Lace Strapless Longline Bra 6621 Nude Front
Elila
Elila Lace Strapless Longline Bra 6621 - Nude Sale price$89.00
Elomi Cate Soft Cup Bra EL4033 Black Front
Elomi
Elomi Cate Side-Support Soft Cup Bra EL4033 - Black Sale price$65.00
Montelle Pure Plus Full Cup T-Shirt Bra 9320 Riviera Front
Montelle
Montelle Pure Plus Full Cup T-Shirt Bra 9320 - Riviera Sale price$69.00
Dominique Vivienne Deep Front Plunge V Wire Longline 8990 Mocha Front
Dominique
Dominique Vivienne Deep Front Plunge V Wire Longline 8990 - Mocha Sale price$86.00
Simone Perele Reve 3D Plunge Bra 12Z316 Sakura Pink Front
Simone Perele
Simone Perele Reve 3D Plunge Bra 12Z316 - Sakura Pink Sale price$120.00
Montelle Berry Garden Pure Plus T-Shirt 9587 Berry Glaze Front
Montelle
Montelle Berry Garden Pure Plus T-Shirt 9587 - Berry Glaze Sale price$74.00
Montelle Pure Plus Full Cup T-Shirt Bra 9320 Moonshell Chantilly Front
Montelle
Montelle Pure Plus Full Cup T-Shirt Bra 9320 - Moonshell/Chantilly Sale price$69.00
Montelle Pure Plus Full Cup T-Shirt Bra 9320 Spiced Coral Front
Montelle
Montelle Pure Plus Full Cup T-Shirt Bra 9320 - Spiced Coral Sale price$69.00
Montelle Pure Plus Full Cup T-Shirt Bra 9320 Seafoam Front
Montelle
Montelle Pure Plus Full Cup T-Shirt Bra 9320 - Seafoam Sale price$69.00
Montelle Pure Plus Full Cup T-Shirt Bra 9320 Turquoise Front
Montelle
Montelle Pure Plus Full Cup T-Shirt Bra 9320 - Turquoise Sale price$69.00
Montelle Wire Free T-Shirt Bra 9317 Raspberry Front
Montelle
Montelle Wire Free T-Shirt Bra 9317 - Raspberry Sale price$59.00
Montelle Cup-Sized Supportive Bralette 9334 Cambridge Blue Front
Montelle
Montelle Cup-Sized Supportive Bralette 9334 - Cambridge Blue Sale price$49.00
Montelle Mysa Cup-Sized Bralette 9335 Spiced Coral Front
Montelle
Montelle Mysa Cup-Sized Bralette 9335 - Spiced Coral Sale price$59.00
Montelle Pure Plus Full Cup T-Shirt Bra 9320 Fudge Front
Montelle
Montelle Pure Plus Full Cup T-Shirt Bra 9320 - Fudge Sale price$69.00
Montelle Mysa Cup-Sized Bralette 9335 Surf Front
Montelle
Montelle Mysa Cup-Sized Bralette 9335 - Surf Sale price$59.00
Louisa Bracq Paco Spacer Bra 48506 Black Front
Louisa Bracq
Louisa Bracq Paco Spacer Bra 48506 - Black Sale price$99.00
Montelle Pure Plus Full Cup T-Shirt Bra 9320 Deep Spruce Front
Montelle
Montelle Pure Plus Full Cup T-Shirt Bra 9320 - Deep Spruce Sale price$69.00
Carnival Invisible Torsolette Longline Bra 426 Black Front
Carnival
Carnival Invisible Torsolette Longline Bra 426 - Black Sale price$96.00
Montelle Mysa Cup-Sized Bralette 9335 Turquoise Front
Montelle
Montelle Mysa Cup-Sized Bralette 9335 - Turquoise Sale price$59.00
Montelle Mysa Cup-Sized Bralette 9335 Sapphire Front
Montelle
Montelle Mysa Cup-Sized Bralette 9335 - Sapphire Sale price$59.00
Glamorise WonderWire Front-Closure Bra 1245 Floral Print Front
Glamorise
Glamorise WonderWire Front-Closure Bra 1245 - Floral Print Sale price$59.00
Glamorise Front-Closure Cotton WonderWire Bra 1241 White Front
Glamorise
Glamorise Front-Closure Cotton WonderWire Bra 1241 - White Sale price$62.00
Carnival Invisible Torsolette Longline Bra 426 White Front
Carnival
Carnival Invisible Torsolette Longline Bra 426 - White Sale price$96.00
Glamorise Lacey T-Back WonderWire Bra 9246 Solid Black Front
Glamorise
Glamorise Lacey T-Back WonderWire Bra 9246 - Solid Black Sale price$59.00
Save $18.50Elomi Cate Soft Cup Bra EL4033 Ink Front
Elomi
Elomi Cate Side-Support Soft Cup Bra EL4033 - Ink Sale price$46.50 Regular price$65.00
Montelle Pure Plus Full Cup T-Shirt Bra 9320 Purple Velvet Front
Montelle
Montelle Pure Plus Full Cup T-Shirt Bra 9320 - Purple Velvet Sale price$69.00

When 40B Cups Leave Space at the Neckline

A gap can involve shape or band movement as well as size. The Montelle Pure Plus Full Cup T-Shirt Bra and Simone Perele Confiance Plunging Padded Bra offer different coverage and shaping. Settle into each and assess pressure elsewhere before deciding that a smaller cup is the answer.

When 40B Wires Press at the Front

Locate the pressure and make sure the wires sit around your breast. The Glamorise Front-Closure Cotton WonderWire Bra has a front clasp and cushioned underwire; the Elomi Cate Soft Cup Bra offers a wire-free full-cup construction with a side panel. Compare the band and cups in either style rather than treating cushioning or removing wires as a certain fix.

When a 40B Strapless Bra Moves Under Clothing

Notice whether the band or cups shift first when you sit and reach. The Wacoal Red Carpet Strapless Bra offers a strapless construction to assess with your outfit. Comfortable band tension and enough cup room matter together; grip features do not establish the fit by themselves.

Frequently Asked Questions About 40B Bras

Is B used in both US and UK 40B sizing?

Yes. Cup shape and brand grading can still differ, so compare the particular model too.

Why might my 40B band rise at the back?

Band tension, cup fit and excessive strap tension can all be involved. Notice what moves before tightening the straps further.

Does a 40B cup gap always mean I need less cup room?

No. Cup shape and band movement can leave space too. Assess the whole cup, including pressure elsewhere.

Will a strapless 40B bra stay up just because it has grip features?

Those features do not replace suitable band and cup fit. Assess comfortable positioning while sitting and reaching.

When should I reassess the fit of a 40B bra?

Reassess when the band no longer stays comfortably positioned, the cups press or gap differently, or adjustments no longer give a comfortable fit.