Bra Atlas

32B bra size: sister sizes, conversions and measurements

"32b bra size" gets 8,100 US searches a month, and 32B is on every chart we read, so the real question is what its sisters are and whether the +4 method has an answer for it. It does not.

Bra Atlas fitting card

32BUK · same in the US

Measures about 32 in underbust and 34 in bust. Same cups as 30C and 34A.

UK
32B
US
32B
EU
70B
FR
85B
AU
10B
JP
C70

Same cups 30C32B34A

Every sister of 32B

  • 26DDTighter band by 6 in, 3 cup letters up (US 26DD, EU 55E)
  • 28DTighter band by 4 in, 2 cup letters up (US 28D, EU 60D)
  • 30CTighter band by 2 in, 1 cup letter up (US 30C, EU 65C)
  • 32BThis size (US 32B, EU 70B)
  • 34ALooser band by 2 in, 1 cup letter down (US 34A, EU 75A)
  • 36AALooser band by 4 in, 2 cup letters down (US 36AA, EU 80AA)

By Rai Ansar · Sizes computed by the Bra Atlas engine, sources checked · How this page was made

30C: band 30 in, same cup volume

30C

tighter band

32B: band 32 in, same cup volume

32B

your size

34A: band 34 in, same cup volume

34A

looser band

Same cups, three bands: 30C, 32B, 34A hold the same cup volume.

Tape measurements that give 32B

Computed by the Bra Atlas engine with the measured-band method, and checked by running each pair back through it.

Underbust and bust for 32BA bust within about a quarter inch of the figure shown still gives 32B.
Snug underbustFullest bustResult
31 in (79 cm)33.5 in (85 cm)32B
31.5 in (80 cm)33.75 in (86 cm)32B
32 in (81 cm)34 in (86 cm)32B
32.5 in (83 cm)34.25 in (87 cm)32B

Same body, other methods: 32 in and 34 in is a 36 (below AA) with the traditional +4 method. With an odd 31 in underbust and a 33.5 in bust we print 32B; calculator.net's rule (band rounded, cup from the raw difference) would print 32C. Why methods differ.

What is particular about 32B

"32b bra size" gets about 8,100 Google searches a month in the US and 1,600 in the UK (Google Ads cluster figures, September 2026; a per-size figure for another country can be the cluster's, so read it as an upper bound).

The +4 method has no letter for it

A 32 in underbust and a 34 in bust measure 32B. The +4 method pads the band to 36, two inches more than the bust, and prints "36 (below AA)". If an old calculator said you are below AA, you may be a 32B.

Two sisters, two very different charts

The tighter sister is 30C and the looser is 34A. The 30C is on Freya, Marks & Spencer, Victoria's Secret, The Little Bra Company, and not on Elomi or ThirdLove (their charts start at a 32 band). The 34A is listed by 4 of the 6 charts.

The same everywhere except Japan

32B reads the same on UK and US labels, EU 70B, France 85B, Australia 10B. Japan's ladder runs a letter ahead, so its label is C70.

32B in every system

32B and its sisters on six labelsEach row holds the same cup volume.
UKUSEUFRAUJP (approx.)
26DD26DD55E70E4DDF55
28D28D60D75D6DE60
30C30C65C80C8CD65
32B32B70B85B10BC70
34A34A75A90A12AB75
36AA36AA80AA95AA14AAA80

Are 32B and its sisters on the brand charts?

A chart check, not a stock check: whether each brand's own printed chart lists the band and cup.

Listed on the brand's chart, or notRead from each brand's own chart, opened 26 and 29 September 2026.
SizeElomiFreyaMarks & SpencerVictoria's SecretThe Little Bra CompanyThirdLove
30CNot listedListedListedListedListedNot listed
32BListedListedListedListedListedListed
34ANot listedNot listedListedListedListedListed

Elomi: US underband and cup sizing, 32 to 48 bands and B to O cups (UK B to K; its chart continues to UK KK). Freya: bands 28 to 44, UK cups B to K. Marks & Spencer: its UK row lists sizes from 28AA to 46K (no FF, HH or JJ); matched here by the label as printed. Victoria's Secret: international chart: bands 30 to 44, AA to DDD (UK E). The Little Bra Company: its size picker: bands 28 to 38, cups AA to D (a specialist for small sizes). ThirdLove: bands 32 to 44, AA to H in US letters (UK FF), plus half cups.

Other sizes and tools

Sources

Each source was opened and checked on the date shown, or on 25 September 2026. Where sources disagree, the page says so instead of picking one silently.

  1. Wikipedia, "Bra size": UK and US cup ladders, the +4 method, EN 13402 and JIS cup steps
  2. White J, Scurr J. Evaluation of professional bra fitting criteria for bra selection and fitting in the UK. Ergonomics 2012;55(6):704-711: 45 women; the traditional method overestimated band and underestimated cup
  3. Victoria's Secret Customer Care, "Size & Fit: International Size Chart (Outside the U.S.)": US sizes sold; bands 30 to 44, cups AA to DDD; US DDD = UK E (opened 26 September 2026)
  4. Freya, "International Bra Size Chart & Bra Sizing": band and cup tables in UK, EU, FR, AU/NZ, US and JP (opened 26 September 2026)
  5. Elomi, "International Size Guide": US underband and cup sizing, B to O cups and 32 to 48 bands; UK, EU, FR, AU/NZ, US and JP rows (UK cups to KK, US to P) (opened 29 September 2026)
  6. ThirdLove, "Bra Size Calculator & Chart": bands 32 to 44, cups AA to H with half cups; calculator run with 6 measurement pairs (opened 26 September 2026)
  7. The Little Bra Company, "Fit Calculator": its size picker offers bands 28 to 38 and cups AA to D (opened 29 September 2026)