Japanese sizing · cup letter first

G80 Bra Size, In Full

A Japanese G80 is a 80 cm band with a G cup: written cup-first, measured in 2.5 cm steps, and one letter ahead of the Western alphabet. In US terms this body wears a 36DDD.

The numbers

G80 measurements

Underbust≈ 80 cm (77.5–82.5)

Top bust≈ 105 cm

Difference≈ 25 cm → JP G

NotationCup first: G80, not 80G

The trap

A Japanese G is not a Western G

Japanese cup labels start earlier and step in 2.5 cm increments, so each letter sits roughly one label ahead of its Western namesake: this G80 corresponds to a US 36DDD and EU 80F. Order your Japanese letter from a Western shop (or vice versa) and you’re a full cup off before the parcel ships. The converter translates in both directions.

US36DDD

UK36E

EU / DE80F

FR / ES95F

IT4F

AU / NZ14E

Bands translate cleanly (same centimeters as EU labels); only the letters shift.

Same volume, different band

G80 sister sizes

Snugger band, same volumeH75

Looser band, same volumeF85

Japanese sisters move in 5 cm band steps with one cup letter, same volume, different circumference. Useful when domestic stock stops one band short of yours.

Construction

What works at this size

At this depth Japanese domestic stock is genuinely scarce: this is specialist territory, and the practical route is international full-bust brands bought by conversion. The US/UK columns below are the sizes to shop.

Neighbors

Related Japanese sizes

Same band (80), other cups

A80B80C80D80E80F80H80

Same cup (G), other bands

G65G70G75G85G90

Answered

G80: answered

What is Japanese G80 in US sizing?

US 36DDD (UK 36E). Japanese cup letters sit one label ahead of Western ones for the same body (a Japanese G corresponds to a Western F-tier cup) so carrying the letter across unconverted buys a cup too big.

What measurements is G80 for?

An underbust around 80 cm (roughly 77.5–82.5 cm) and a top bust near 105 cm: a difference of about 25 cm, which Japanese sizing labels G. Japan measures in 2.5 cm cup steps against Europe's 2 cm, so conversions are nearest-label, not exact.

Why is the cup letter written first in G80?

Japanese convention writes cup-then-band. C70, not 70C. Same information, reversed order; on tags in Japan you may also see the band alone (70) with the cup on a separate line.

Shop itAt HauteFlair, our sister retailer

36G bras →Sister 34H Sister 38DDD

HauteFlair labels cups in UK letters, so these links already convert your size by position (a US DDD lands on a UK E, a US G on a UK F). 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.

Start from the measured size

Two measurements, no inches added, sister sizes attached.

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