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