Bra AtlasBra sizing, measured and sourced

36DD sister size chart, conversions and measurements

On brands that print E for DD, 36DD is sold as 36E, while a UK 36E is a full cup bigger.

Bra Atlas fitting card

36DDUK · same in the US

Measures about 36 in underbust and 41 in bust. Same cups as 34E and 38D.

UK
36DD
US
36DD
EU
80E
FR
95E
AU
14DD
JP
F80

Same cups 34E36DD38D

Every sister of 36DD

  • 32FTighter band by 4 in, 2 cup letters up (US 32G, EU 70G)
  • 34ETighter band by 2 in, 1 cup letter up (US 34DDD, EU 75F)
  • 36DDThis size (US 36DD, EU 80E)
  • 38DLooser band by 2 in, 1 cup letter down (US 38D, EU 85D)
  • 40CLooser band by 4 in, 2 cup letters down (US 40C, EU 90C)

By Rai Ansar · Sizes computed by the Bra Atlas engine · Sources and checked dates · How the sizes are calculated

34E: band 34 in, same cup volume. Shown: a woman with deep brown skin and a rounded afro in a rose bra.

34E

tighter band

36DD: band 36 in, same cup volume. Shown: a woman with olive skin and long dark waves in a lilac bra.

36DD

your size

38D: band 38 in, same cup volume. Shown: a woman with light skin and straight black hair with a fringe in a sage bra.

38D

looser band

Same cups, three bands: 34E, 36DD, 38D hold the same cup volume.

Tape measurements that give 36DD

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

Underbust and bust for 36DDThese are examples from our measured-band rule; other calculators can round fractional measurements differently.
Snug underbustFullest bustResult
35 in (89 cm)40.5 in (103 cm)36DD
35.5 in (90 cm)40.75 in (104 cm)36DD
36 in (91 cm)41 in (104 cm)36DD
36.5 in (93 cm)41.25 in (105 cm)36DD

Our +4 comparison gives 40A for 36 in underbust and 41 in bust. With an odd 35 in underbust and a 40 in bust we print 36D/DD; our fixture-backed model of calculator.net's unpadded row gives 36DD. How the +4 and measured-band methods work.

What is particular about 36DD

Three calculators agreed

One of our 10 test measurements was a 36 in underbust with a 41 in bust. A Bra That Fits printed 36DD, calculator.net printed 36 DD/E, and our engine prints 36DD. Our +4 comparison takes the cup from 41 − 40 = 1 in and gives 40A. Calculator.net's own +4 row instead keeps the DD cup and prints UK 40DD (US 40 DD/E). Recorded on 25 September 2026.

US 36E is not UK 36E

Victoria's Secret and ThirdLove use E as an alias for DD and F for DDD. On those labels, a US "36E" is this size. A UK 36E is one cup bigger: US 36DDD on Wacoal's and Freya's charts. Check the cup ladder in the brand's own guide.

Which sister to try

Band riding up: 34E (US 34DDD). Band digging in: 38D. 40C is two steps away. Try the nearer sister first; the size label alone does not tell you the wire shape.

36DD in every system

36DD and its sisters on six labelsEach row has the same sister-size volume index. These are conversion-model labels, not proof a brand makes each size; check the brand chart before ordering.
UKUSEUFRAUJP (approx.)
32F32G70G85G10FH70
34E34DDD75F90F12EG75
36DD36DD80E95E14DDF80
38D38D85D100D16DE85
40C40C90C105C18CD90

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. A Bra That Fits calculator (community calculator of r/ABraThatFits): we submitted 18 measurement pairs in 6 systems on 25 September 2026; raw synthetic fixture outputs are linked from the methodology
  2. calculator.net, Bra Size Calculator: 10 measurement pairs run in a browser on 25 September 2026
  3. Wikipedia, "Bra size": UK and US cup ladders, the +4 method, EN 13402 and JIS cup steps
  4. Victoria's Secret Customer Care, "Size & Fit: Bras & Bralettes": US guide states bands 30 to 46 and cups A to O, not all styles in all sizes; bralette rows print DD (E) and DDD (F) (opened 25 September 2026)
  5. ThirdLove, "Bra Size Calculator & Chart": bands 32 to 44, cups AA to H with half cups; 6 synthetic pairs submitted to the calculator; 5 result pairs recorded (opened 25 September 2026)
  6. Freya, "International Bra Size Chart & Bra Sizing": band and cup tables in UK, EU, FR, AU/NZ, US and JP (opened 25 September 2026)
  7. 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 25 September 2026)
  8. Wacoal, "International Size Guide": UK AA to GG paired with US AA to J; AUS/NZ keeps FF and GG; band and cup rows are separate, not a stock list (opened 13 October 2026)
  9. Marks & Spencer US, "Bras size guide": UK, AU/NZ, US/CA, EU and FR conversion table (opened 25 September 2026)