Size conversion
What Is a 42I in Other Brands?
Bra sizes are not standardized: the same label means different things brand to brand, so your 42I is a starting point, not a fixed size. A US 42I usually needs a 42J in Victoria’s Secret, maps to a 42G in a true-to-size UK brand like Panache, and stays a 42I in Wacoal.
Your 42I in Victoria's Secret
42J
Cups run a full cup small, so size up
Your 42I in Panache
42G
True-to-size UK sizing
Your 42I in Wacoal
42I
True to size, year after year
Every brand we track
Your 42I, 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 42I → |
|---|---|---|
| ThirdLovein stock | cups run generous | 42I |
| Wacoalin stock | true to size | 42I |
| Glamorisein stock | true to size | 42I |
| SHEFITin stock | - | Adjustable XS-6Luxe sizing rather than standard band/cup; size by the brand chart. |
| b.tempt'din stock | true to size | 42I |
| 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 | 42I |
| Bali | band runs large | 40I |
| Playtex | band runs large | 40I |
| Maidenform | true to size | 42I |
| Vanity Fair | band runs large | 42I |
| Calvin Klein | band runs small | 42I |
| Victoria's Secret | cups run small | 42J |
| Brooks | band runs small | 42I |
| 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 | 42I |
| Torrid | band runs large | 42I |
UK
UK-sized brands (cups run D, DD, E, F, FF, G...)
EU
EU-sized brands
| Brand | How it runs | Your 42I → |
|---|---|---|
| Chantelle | cups run small | 42I |
| Simone Perele | cups run small | 42I |
| PrimaDonna | true to size | 42I |
| Marie Jo | true to size | 42I |
| Triumph | band runs large | 42I |
| Anita | true to size | 42I |
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 42I now
Real bras we track in stock in 42I, with live prices.
Fantasie
Fusion Full Cup Side Support Bra: Sand
$69.00View →
Fantasie
Fusion Full Cup Side Support Bra: Black
$69.00View →
Fantasie
Illusion Side Support Bra: White
$69.00View →
Fantasie
Illusion Side Support Bra: Sky
$69.00View →
Fantasie
Illusion Side Support Bra: Navy
$69.00View →
Fantasie
Illusion Side Support Bra: Natural Beige
$69.00View →
Fantasie
Illusion Side Support Bra: Black
$69.00View →
Fantasie
Illusion Side Support Bra: Blush
$69.00View →
42I sister sizes
Sister sizes hold the same cup volume on a different band. If the 42I cup fits but the band doesn’t, try:
Interactive
Try your own size
Not a 42I? Enter any size to see it in every brand. Your size never leaves your browser.
Brand Size Translator
Find your size across different brands
42I
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.
42I
Wacoal
US
True to size; consistent fit across decades.
42I
Panache
UK
UK sizing; true to size, consistent year over year.
42G
Freya
UK
UK sizing; bands run snug.
42G
Elomi
UK
UK plus-size full-bust; cups run generous.
42G
Glamorise
US
US full-figure; true to size.
42I
SHEFIT
US
Adjustable XS-6Luxe sizing rather than standard band/cup; size by the brand chart.
42I
b.tempt'd
US
Wacoal-family fit DNA; runs true to US sizing, lighter construction.
42I
Kindred Bravely
US
Uses XS-XXL nursing/maternity sizing rather than band/cup; size by the brand chart.
42I
ENELL
US
Uses numeric high-impact sizing (00-8) rather than band/cup; size by the brand chart.
42I
Natori
US
Cups run small; consider sizing up.
42I
Chantelle
EU
French sizing; cups run small.
42I
Bali
US
Bands run loose; consider sizing down.
40I
Playtex
US
Bands run large; size down in band.
40I
Maidenform
US
Generally true to size.
42I
Vanity Fair
US
Bands run slightly loose.
42I
Calvin Klein
US
Bands run slightly snug.
42I
Victoria's Secret
US
Cups run very small; size up a full cup.
42J
Fantasie
UK
UK sizing; consistent fit.
42G
Curvy Kate
UK
UK sizing; bands run firm.
42G
Gossard
UK
UK sizing; classic fit.
42G
Pour Moi
UK
UK sizing; budget-friendly.
42G
Simone Perele
EU
French luxury; cups run small.
42I
PrimaDonna
EU
Belgian luxury; true EU sizing.
42I
Marie Jo
EU
Belgian; consistent fit.
42I
Triumph
EU
German; bands slightly generous.
42I
Anita
EU
German; strong post-surgery range.
42I
Brooks
US
Compression sports style; may run snug.
42I
Under Armour
US
Compression fit runs generous; XS-XL sizing rather than band/cup; size by the brand chart.
42I
Nike
US
Generous fit; XS-XL sizing rather than band/cup; size by the brand chart.
42I
Goddess
UK
UK sizing; strong plus-size range.
42G
Cacique
US
Lane Bryant's brand; bands run generous.
42I
Torrid
US
Plus-focused; bands run large.
42I
Common questions
42I conversion questions
- What is a 42I in Victoria's Secret?
- Victoria's Secret cups run about a full cup small, so a standard US 42I usually needs a 42J there. If you already wear a 42I in Victoria's Secret, your size in a true-to-size brand is likely a cup smaller.
- Which brands keep a 42I the same?
- In true-to-size brands a US 42I stays a 42I: 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 42I 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 42I is a 42G; the band number stays the same.
- What size replaces a 42I 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 42I doesn't carry over directly. Start from each brand's chart with your underbust and bust measurements.