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29-Inch Underbust Bra Size

A snug 29″ underbust (74 cm) is a 30 band. 29 is odd, so it rounds up to the even band. Slide to your bust measurement and the size appears; the table shows every cup a 30 band can carry.

Live

My underbust is 29″: what's my size?

tape level, touching not compressing
Underbust 29″ · band 30 · your size
30C
Sister sizes
Read the guide →

The band comes from the underbust alone. 29″ → 30 band whatever your bust; the bust only decides the cup letter: one letter per inch above 30.

Lookup

Every size on a 30 band, by bust

BustDifferenceBra sizeSister sizes
31″ · 79 cm1″30A28B · —
32″ · 81 cm2″30B28C · 32A
33″ · 84 cm3″30C28D · 32B
34″ · 86 cm4″30D28DD · 32C
35″ · 89 cm5″30DD28DDD · 32D
36″ · 91 cm6″30DDD28G · 32DD
37″ · 94 cm7″30G28H · 32DDD
38″ · 97 cm8″30H28I · 32G
On the scale

Where 29″ lands

US band scale · your band and its sister bands
28303234363840424446
29″ → 30. Sister bands 28 and 32 hold the same cup volume with one cup letter up or down.
How a 30 band should feelLevel, firm on the loosest hook, two fingers underneath, no ride-up when you raise your arms
The band abroad

A 30 band in every system

US / UK30
EU / DE / JP65
FR / ES80
AU / NZ8
IT1
Underbust29″ · 74 cm

Odd number? Yes. 29 rounds up to 30. If the 30 band feels loose, try 28 with the sister cup (one letter up). Bands are always even; the underbust reading between them goes to the sister size that fits.

Measure

Getting the underbust right

1Snug and level

Firm against the ribs, level all the way round, on a normal exhale. A slack tape adds an inch and a band size.

2Round, don't add

Nearest whole inch, odd rounds up to even. Never add four inches: that is the outdated rule.

3Loosest hook when new

The band should fasten on the loosest hook and feel firm; move inward as it stretches over months.

Full technique with diagrams: how to measure your bra size.

Answered

29-inch underbust: answered

What band size is a 29 inch underbust?

A 30 band. Odd readings round up to the even band; if 30 feels loose, try 28 with the sister cup.

What bra size is a 29 inch underbust and a 33 inch bust?

30C: a three-inch difference on a 30 band. Bust 34 would be 30D, 32 would be 30B.

What is a 30 band in EU sizing?

EU 65 (US band × 2.5 − 10); FR 80; AU 8; IT 1.

Should the tape be tight for the underbust?

Snug: firm against the ribcage like a well-fitting band, not painful. Two inches of slack turns a 34 band into a 36.

Can a 29 inch underbust wear a 28 band?

Often, as a sister size. 28 with one cup letter up holds the same volume on a firmer band, useful if 30 rides up or you are between readings.

Shop itAt HauteFlair, our sister retailer

Opens HauteFlair’s own hub page; use your measured size there. HauteFlair is owned by the same company as Brasize.ai; that relationship never changes the sizing math, charts, or fit advice on this page. How this site makes money.

Enter both measurements

Underbust and bust together give one exact size.

Calculate My Bra Size →