Size conversion
What Is a 42M in Other Brands?
Bra sizes are not standardized: the same label means different things brand to brand, so your 42M is a starting point, not a fixed size. A US 42M usually needs a 42N in Victoria’s Secret, maps to a 42J in a true-to-size UK brand like Panache, and stays a 42M in Wacoal.
Your 42M in Victoria's Secret
42N
Cups run a full cup small, so size up
Your 42M in Panache
42J
True-to-size UK sizing
Your 42M in Wacoal
42M
True to size, year after year
Every brand we track
Your 42M, 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 42M → |
|---|---|---|
| ThirdLovein stock | cups run generous | 42M |
| Wacoalin stock | true to size | 42M |
| Glamorisein stock | true to size | 42M |
| SHEFITin stock | - | Adjustable XS-6Luxe sizing rather than standard band/cup; size by the brand chart. |
| b.tempt'din stock | true to size | 42M |
| 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 | 42M |
| Bali | band runs large | 40M |
| Playtex | band runs large | 40M |
| Maidenform | true to size | 42M |
| Vanity Fair | band runs large | 42M |
| Calvin Klein | band runs small | 42M |
| Victoria's Secret | cups run small | 42N |
| Brooks | band runs small | 42M |
| 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 | 42M |
| Torrid | band runs large | 42M |
UK
UK-sized brands (cups run D, DD, E, F, FF, G...)
EU
EU-sized brands
| Brand | How it runs | Your 42M → |
|---|---|---|
| Chantelle | cups run small | 42M |
| Simone Perele | cups run small | 42M |
| PrimaDonna | true to size | 42M |
| Marie Jo | true to size | 42M |
| Triumph | band runs large | 42M |
| Anita | true to size | 42M |
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 42M now
Real bras we track in stock in 42M, with live prices.
Elomi
Molly Nursing Bra: Cameo Rose
$75.00View →
Elomi
Molly Nursing Bra: Black
$75.00View →
Elomi
Lucie Stretch Plunge Bra: Wildcat
$74.00View →
Elomi
Lucie Stretch Plunge Bra: White
$74.00View →
Elomi
Lucie Stretch Plunge Bra: Pale Blush
$74.00View →
Elomi
Lucie Stretch Plunge Bra: Mocha
$74.00View →
Elomi
Lucie Stretch Plunge Bra: Midnight
$72.00View →
Elomi
Lucie Stretch Plunge Bra: Black
$74.00View →
42M sister sizes
Sister sizes hold the same cup volume on a different band. If the 42M cup fits but the band doesn’t, try:
Interactive
Try your own size
Not a 42M? Enter any size to see it in every brand. Your size never leaves your browser.
Brand Size Translator
Find your size across different brands
42M
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.
42M
Wacoal
US
True to size; consistent fit across decades.
42M
Panache
UK
UK sizing; true to size, consistent year over year.
42J
Freya
UK
UK sizing; bands run snug.
42J
Elomi
UK
UK plus-size full-bust; cups run generous.
42J
Glamorise
US
US full-figure; true to size.
42M
SHEFIT
US
Adjustable XS-6Luxe sizing rather than standard band/cup; size by the brand chart.
42M
b.tempt'd
US
Wacoal-family fit DNA; runs true to US sizing, lighter construction.
42M
Kindred Bravely
US
Uses XS-XXL nursing/maternity sizing rather than band/cup; size by the brand chart.
42M
ENELL
US
Uses numeric high-impact sizing (00-8) rather than band/cup; size by the brand chart.
42M
Natori
US
Cups run small; consider sizing up.
42M
Chantelle
EU
French sizing; cups run small.
42M
Bali
US
Bands run loose; consider sizing down.
40M
Playtex
US
Bands run large; size down in band.
40M
Maidenform
US
Generally true to size.
42M
Vanity Fair
US
Bands run slightly loose.
42M
Calvin Klein
US
Bands run slightly snug.
42M
Victoria's Secret
US
Cups run very small; size up a full cup.
42N
Fantasie
UK
UK sizing; consistent fit.
42J
Curvy Kate
UK
UK sizing; bands run firm.
42J
Gossard
UK
UK sizing; classic fit.
42J
Pour Moi
UK
UK sizing; budget-friendly.
42J
Simone Perele
EU
French luxury; cups run small.
42M
PrimaDonna
EU
Belgian luxury; true EU sizing.
42M
Marie Jo
EU
Belgian; consistent fit.
42M
Triumph
EU
German; bands slightly generous.
42M
Anita
EU
German; strong post-surgery range.
42M
Brooks
US
Compression sports style; may run snug.
42M
Under Armour
US
Compression fit runs generous; XS-XL sizing rather than band/cup; size by the brand chart.
42M
Nike
US
Generous fit; XS-XL sizing rather than band/cup; size by the brand chart.
42M
Goddess
UK
UK sizing; strong plus-size range.
42J
Cacique
US
Lane Bryant's brand; bands run generous.
42M
Torrid
US
Plus-focused; bands run large.
42M
Common questions
42M conversion questions
- What is a 42M in Victoria's Secret?
- Victoria's Secret cups run about a full cup small, so a standard US 42M usually needs a 42N there. If you already wear a 42M in Victoria's Secret, your size in a true-to-size brand is likely a cup smaller.
- Which brands keep a 42M the same?
- In true-to-size brands a US 42M stays a 42M: 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 42M 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 42M is a 42J; the band number stays the same.
- What size replaces a 42M 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 42M doesn't carry over directly. Start from each brand's chart with your underbust and bust measurements.