Size conversion
What Is a 44O in Other Brands?
Bra sizes are not standardized: the same label means different things brand to brand, so your 44O is a starting point, not a fixed size. A US 44O usually needs a 44AA in Victoria’s Secret, maps to a 44AA in a true-to-size UK brand like Panache, and stays a 44AA in Wacoal.
Your 44O in Victoria's Secret
44AA
Cups run a full cup small, so size up
Your 44O in Panache
44AA
True-to-size UK sizing
Your 44O in Wacoal
44AA
True to size, year after year
Every brand we track
Your 44O, 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 44O → |
|---|---|---|
| ThirdLovein stock | cups run generous | 44AA |
| Wacoalin stock | true to size | 44AA |
| Glamorisein stock | true to size | 44AA |
| SHEFITin stock | - | Adjustable XS-6Luxe sizing rather than standard band/cup; size by the brand chart. |
| b.tempt'din stock | true to size | 44AA |
| 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 | 44AA |
| Bali | band runs large | 42AA |
| Playtex | band runs large | 42AA |
| Maidenform | true to size | 44AA |
| Vanity Fair | band runs large | 44AA |
| Calvin Klein | band runs small | 44AA |
| Victoria's Secret | cups run small | 44AA |
| Brooks | band runs small | 44AA |
| 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 | 44AA |
| Torrid | band runs large | 44AA |
UK
UK-sized brands (cups run D, DD, E, F, FF, G...)
EU
EU-sized brands
| Brand | How it runs | Your 44O → |
|---|---|---|
| Chantelle | cups run small | 44AA |
| Simone Perele | cups run small | 44AA |
| PrimaDonna | true to size | 44AA |
| Marie Jo | true to size | 44AA |
| Triumph | band runs large | 44AA |
| Anita | true to size | 44AA |
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 44O now
Real bras we track in stock in 44O, with live prices.
Panache
Josephine Full Cup Bra - Magenta/Latte
$41.50View →
Panache
Bliss Full Cup Bra - Lilac
$38.00View →
Panache
Estel Full Cup Bra - Royal Blue
$41.00View →
Panache
Upbeat Wired Sports Bra - Blue
$43.00View →
Panache
Josephine Full Cup Bra - Cobalt/Latte
$41.50View →
Panache
Tango Balcony Bra - Honey
$69.00View →
Panache
Tango Balcony Bra - Blush
$69.00View →
Panache
Tango Balcony Bra - Chai
$42.50View →
44O sister sizes
Sister sizes hold the same cup volume on a different band. If the 44O cup fits but the band doesn’t, try:
Interactive
Try your own size
Not a 44O? Enter any size to see it in every brand. Your size never leaves your browser.
Brand Size Translator
Find your size across different brands
44O
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.
44AA
Wacoal
US
True to size; consistent fit across decades.
44AA
Panache
UK
UK sizing; true to size, consistent year over year.
44AA
Freya
UK
UK sizing; bands run snug.
44AA
Elomi
UK
UK plus-size full-bust; cups run generous.
44AA
Glamorise
US
US full-figure; true to size.
44AA
SHEFIT
US
Adjustable XS-6Luxe sizing rather than standard band/cup; size by the brand chart.
44AA
b.tempt'd
US
Wacoal-family fit DNA; runs true to US sizing, lighter construction.
44AA
Kindred Bravely
US
Uses XS-XXL nursing/maternity sizing rather than band/cup; size by the brand chart.
44AA
ENELL
US
Uses numeric high-impact sizing (00-8) rather than band/cup; size by the brand chart.
44AA
Natori
US
Cups run small; consider sizing up.
44AA
Chantelle
EU
French sizing; cups run small.
44AA
Bali
US
Bands run loose; consider sizing down.
42AA
Playtex
US
Bands run large; size down in band.
42AA
Maidenform
US
Generally true to size.
44AA
Vanity Fair
US
Bands run slightly loose.
44AA
Calvin Klein
US
Bands run slightly snug.
44AA
Victoria's Secret
US
Cups run very small; size up a full cup.
44AA
Fantasie
UK
UK sizing; consistent fit.
44AA
Curvy Kate
UK
UK sizing; bands run firm.
44AA
Gossard
UK
UK sizing; classic fit.
44AA
Pour Moi
UK
UK sizing; budget-friendly.
44AA
Simone Perele
EU
French luxury; cups run small.
44AA
PrimaDonna
EU
Belgian luxury; true EU sizing.
44AA
Marie Jo
EU
Belgian; consistent fit.
44AA
Triumph
EU
German; bands slightly generous.
44AA
Anita
EU
German; strong post-surgery range.
44AA
Brooks
US
Compression sports style; may run snug.
44AA
Under Armour
US
Compression fit runs generous; XS-XL sizing rather than band/cup; size by the brand chart.
44AA
Nike
US
Generous fit; XS-XL sizing rather than band/cup; size by the brand chart.
44AA
Goddess
UK
UK sizing; strong plus-size range.
44AA
Cacique
US
Lane Bryant's brand; bands run generous.
44AA
Torrid
US
Plus-focused; bands run large.
44AA
Common questions
44O conversion questions
- What is a 44O in Victoria's Secret?
- Victoria's Secret cups run about a full cup small, so a standard US 44O usually needs a 44AA there. If you already wear a 44O in Victoria's Secret, your size in a true-to-size brand is likely a cup smaller.
- Which brands keep a 44O the same?
- In true-to-size brands a US 44O stays a 44O: 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 44O 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 44O is a 44AA; the band number stays the same.
- What size replaces a 44O 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 44O doesn't carry over directly. Start from each brand's chart with your underbust and bust measurements.