Size conversion
What Is a 42B in Other Brands?
Bra sizes are not standardized: the same label means different things brand to brand, so your 42B is a starting point, not a fixed size. A US 42B usually needs a 42C in Victoria’s Secret, maps to a 42B in a true-to-size UK brand like Panache, and stays a 42B in Wacoal.
Your 42B in Victoria's Secret
42C
Cups run a full cup small, so size up
Your 42B in Panache
42B
True-to-size UK sizing
Your 42B in Wacoal
42B
True to size, year after year
Every brand we track
Your 42B, brand by brand
Grouped by the sizing system each brand labels its cups in. Brands we stock link to their full lineup.
US
US-sized brands
| Brand | How it runs | Your 42B → |
|---|---|---|
| ThirdLovein stock | cups run generous | 42B |
| Wacoalin stock | true to size | 42B |
| Glamorisein stock | true to size | 42B |
| SHEFITin stock | - | Adjustable XS-6Luxe sizing rather than standard band/cup; size by the brand chart. |
| b.tempt'din stock | true to size | 42B |
| Kindred Bravelyin stock | - | Uses XS-XXL nursing/maternity sizing rather than band/cup; size by the brand chart. |
| ENELLin stock | - | Uses numeric high-impact sizing (00-8) rather than band/cup; size by the brand chart. |
| Natori | cups run small | 42B |
| Bali | band runs large | 40B |
| Playtex | band runs large | 40B |
| Maidenform | true to size | 42B |
| Vanity Fair | band runs large | 42B |
| Calvin Klein | band runs small | 42B |
| Victoria's Secret | cups run small | 42C |
| Brooks | band runs small | 42B |
| Under Armour | - | Compression fit runs generous; XS-XL sizing rather than band/cup; size by the brand chart. |
| Nike | - | Generous fit; XS-XL sizing rather than band/cup; size by the brand chart. |
| Cacique | band runs large | 42B |
| Torrid | band runs large | 42B |
UK
UK-sized brands (cups run D, DD, E, F, FF, G...)
EU
EU-sized brands
| Brand | How it runs | Your 42B → |
|---|---|---|
| Chantelle | cups run small | 42B |
| Simone Perele | cups run small | 42B |
| PrimaDonna | true to size | 42B |
| Marie Jo | true to size | 42B |
| Triumph | band runs large | 42B |
| Anita | true to size | 42B |
Translations are guidance from cross-brand fit data, not a guarantee - fit also depends on breast shape and style. Cross-brand offset data v1-2026-05-28.
In stock now
Shop 42B now
Real bras we track in stock in 42B, with live prices.
Elomi
Cate Non Wired Soft Cup Bra: Latte
$69.00View →
Elomi
Cate Non Wired Soft Cup Bra: White
$69.00View →
Elomi
Cate Non Wired Soft Cup Bra: Black
$69.00View →
ThirdLove
24/7® Classic T-Shirt Bra: Soft-Pink
$65.00View →
ThirdLove
24/7® Classic T-Shirt Bra: Sienna
$65.00View →
ThirdLove
24/7® Classic T-Shirt Bra: Mocha
$65.00View →
ThirdLove
24/7® Classic T-Shirt Bra: Espresso
$65.00View →
ThirdLove
24/7® Classic T-Shirt Bra: Black
$65.00View →
42B sister sizes
Sister sizes hold the same cup volume on a different band. If the 42B cup fits but the band doesn’t, try:
Interactive
Try your own size
Not a 42B? Enter any size to see it in every brand. Your size never leaves your browser.
Brand Size Translator
Find your size across different brands
42B
Why sizes vary: Each brand uses different patterns, materials, and fit philosophies. A 34DD in Victoria's Secret fits differently than a 34DD in Panache.
ThirdLove
US
Half-cup sizing available; cups run slightly generous.
42B
Wacoal
US
True to size; consistent fit across decades.
42B
Panache
UK
UK sizing; true to size, consistent year over year.
42B
Freya
UK
UK sizing; bands run snug.
42B
Elomi
UK
UK plus-size full-bust; cups run generous.
42B
Glamorise
US
US full-figure; true to size.
42B
SHEFIT
US
Adjustable XS-6Luxe sizing rather than standard band/cup; size by the brand chart.
42B
b.tempt'd
US
Wacoal-family fit DNA; runs true to US sizing, lighter construction.
42B
Kindred Bravely
US
Uses XS-XXL nursing/maternity sizing rather than band/cup; size by the brand chart.
42B
ENELL
US
Uses numeric high-impact sizing (00-8) rather than band/cup; size by the brand chart.
42B
Natori
US
Cups run small; consider sizing up.
42B
Chantelle
EU
French sizing; cups run small.
42B
Bali
US
Bands run loose; consider sizing down.
40B
Playtex
US
Bands run large; size down in band.
40B
Maidenform
US
Generally true to size.
42B
Vanity Fair
US
Bands run slightly loose.
42B
Calvin Klein
US
Bands run slightly snug.
42B
Victoria's Secret
US
Cups run very small; size up a full cup.
42C
Fantasie
UK
UK sizing; consistent fit.
42B
Curvy Kate
UK
UK sizing; bands run firm.
42B
Gossard
UK
UK sizing; classic fit.
42B
Pour Moi
UK
UK sizing; budget-friendly.
42B
Simone Perele
EU
French luxury; cups run small.
42B
PrimaDonna
EU
Belgian luxury; true EU sizing.
42B
Marie Jo
EU
Belgian; consistent fit.
42B
Triumph
EU
German; bands slightly generous.
42B
Anita
EU
German; strong post-surgery range.
42B
Brooks
US
Compression sports style; may run snug.
42B
Under Armour
US
Compression fit runs generous; XS-XL sizing rather than band/cup; size by the brand chart.
42B
Nike
US
Generous fit; XS-XL sizing rather than band/cup; size by the brand chart.
42B
Goddess
UK
UK sizing; strong plus-size range.
42B
Cacique
US
Lane Bryant's brand; bands run generous.
42B
Torrid
US
Plus-focused; bands run large.
42B
Common questions
42B conversion questions
- What is a 42B in Victoria's Secret?
- Victoria's Secret cups run about a full cup small, so a standard US 42B usually needs a 42C there. If you already wear a 42B in Victoria's Secret, your size in a true-to-size brand is likely a cup smaller.
- Which brands keep a 42B the same?
- In true-to-size brands a US 42B stays a 42B: Wacoal, Panache, Glamorise, b.tempt'd, Maidenform, Fantasie, Gossard, Pour Moi, PrimaDonna, Marie Jo, Anita, Goddess. Fit can still vary by style, so treat the label as the starting point.
- Do UK brands size a 42B differently from US brands?
- UK brands label cups in a different sequence above D (D, DD, E, F, FF, G), so the same letters can mean different volumes. In a true-to-size UK brand like Panache, a US 42B is a 42B; the band number stays the same.
- What size replaces a 42B in brands that don't use cup sizes?
- SHEFIT, Kindred Bravely, ENELL, Under Armour, Nike size by their own charts (XS-XL or numeric) instead of band/cup, so a 42B doesn't carry over directly. Start from each brand's chart with your underbust and bust measurements.