Size conversion
What Is a 48I in Other Brands?
Bra sizes are not standardized: the same label means different things brand to brand, so your 48I is a starting point, not a fixed size. A US 48I usually needs a 48J in Victoria’s Secret, maps to a 48G in a true-to-size UK brand like Panache, and stays a 48I in Wacoal.
Your 48I in Victoria's Secret
48J
Cups run a full cup small, so size up
Your 48I in Panache
48G
True-to-size UK sizing
Your 48I in Wacoal
48I
True to size, year after year
Every brand we track
Your 48I, 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 48I → |
|---|---|---|
| ThirdLovein stock | cups run generous | 48I |
| Wacoalin stock | true to size | 48I |
| Glamorisein stock | true to size | 48I |
| SHEFITin stock | - | Adjustable XS-6Luxe sizing rather than standard band/cup; size by the brand chart. |
| b.tempt'din stock | true to size | 48I |
| 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 | 48I |
| Bali | band runs large | 46I |
| Playtex | band runs large | 46I |
| Maidenform | true to size | 48I |
| Vanity Fair | band runs large | 48I |
| Calvin Klein | band runs small | 48I |
| Victoria's Secret | cups run small | 48J |
| Brooks | band runs small | 48I |
| 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 | 48I |
| Torrid | band runs large | 48I |
UK
UK-sized brands (cups run D, DD, E, F, FF, G...)
| Brand | How it runs | Your 48I → |
|---|---|---|
| Panachein stock | true to size | 48G |
| Bravissimoin stock | true to size | 48G |
| Freyain stock | band runs small | 48G |
| Elomiin stock | cups run generous | 48G |
| Fantasiein stock | true to size | 48G |
| Curvy Kate | band runs small | 48G |
| Gossard | true to size | 48G |
| Pour Moi | true to size | 48G |
| Goddess | true to size | 48G |
EU
EU-sized brands
| Brand | How it runs | Your 48I → |
|---|---|---|
| Chantelle | cups run small | 48I |
| Simone Perele | cups run small | 48I |
| PrimaDonna | true to size | 48I |
| Marie Jo | true to size | 48I |
| Triumph | band runs large | 48I |
| Anita | true to size | 48I |
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 48I now
Real bras we track in stock in 48I, 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 →
Glamorise
Lace Comfort WonderWire Bra Black
$60.00View →
Glamorise
MagicLift Front-Closure Natural Shape Bra White
$59.00View →
Glamorise
MagicLift Front-Closure Natural Shape Bra Black
$59.00View →
Glamorise
Lace Comfort WonderWire Bra Jade
$60.00View →
Glamorise
MagicLift Front-Closure Posture Back Bra Blue
$43.40View →
48I sister sizes
Sister sizes hold the same cup volume on a different band. If the 48I cup fits but the band doesn’t, try:
Interactive
Try your own size
Not a 48I? Enter any size to see it in every brand. Your size never leaves your browser.
Brand Size Translator
Find your size across different brands
48I
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.
48I
Wacoal
US
True to size; consistent fit across decades.
48I
Panache
UK
UK sizing; true to size, consistent year over year.
48G
Bravissimo
UK
UK sizing, and its US site labels cups the UK way too (FF, GG, HH). Fit offsets not yet measured.
48G
Freya
UK
UK sizing; bands run snug.
48G
Elomi
UK
UK plus-size full-bust; cups run generous.
48G
Glamorise
US
US full-figure; true to size.
48I
SHEFIT
US
Adjustable XS-6Luxe sizing rather than standard band/cup; size by the brand chart.
48I
b.tempt'd
US
Wacoal-family fit DNA; runs true to US sizing, lighter construction.
48I
Kindred Bravely
US
Uses XS-XXL nursing/maternity sizing rather than band/cup; size by the brand chart.
48I
ENELL
US
Uses numeric high-impact sizing (00-8) rather than band/cup; size by the brand chart.
48I
Natori
US
Cups run small; consider sizing up.
48I
Chantelle
EU
French sizing; cups run small.
48I
Bali
US
Bands run loose; consider sizing down.
46I
Playtex
US
Bands run large; size down in band.
46I
Maidenform
US
Generally true to size.
48I
Vanity Fair
US
Bands run slightly loose.
48I
Calvin Klein
US
Bands run slightly snug.
48I
Victoria's Secret
US
Cups run very small; size up a full cup.
48J
Fantasie
UK
UK sizing; consistent fit.
48G
Curvy Kate
UK
UK sizing; bands run firm.
48G
Gossard
UK
UK sizing; classic fit.
48G
Pour Moi
UK
UK sizing; budget-friendly.
48G
Simone Perele
EU
French luxury; cups run small.
48I
PrimaDonna
EU
Belgian luxury; true EU sizing.
48I
Marie Jo
EU
Belgian; consistent fit.
48I
Triumph
EU
German; bands slightly generous.
48I
Anita
EU
German; strong post-surgery range.
48I
Brooks
US
Compression sports style; may run snug.
48I
Under Armour
US
Compression fit runs generous; XS-XL sizing rather than band/cup; size by the brand chart.
48I
Nike
US
Generous fit; XS-XL sizing rather than band/cup; size by the brand chart.
48I
Goddess
UK
UK sizing; strong plus-size range.
48G
Cacique
US
Lane Bryant's brand; bands run generous.
48I
Torrid
US
Plus-focused; bands run large.
48I
Common questions
48I conversion questions
- What is a 48I in Victoria's Secret?
- Victoria's Secret cups run about a full cup small, so a standard US 48I usually needs a 48J there. If you already wear a 48I in Victoria's Secret, your size in a true-to-size brand is likely a cup smaller.
- Which brands keep a 48I the same?
- In true-to-size brands a US 48I stays a 48I: Wacoal, Panache, Bravissimo, 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 48I 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 48I is a 48G; the band number stays the same.
- What size replaces a 48I 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 48I doesn't carry over directly. Start from each brand's chart with your underbust and bust measurements.