knowhersize

Reviewed

28A bra size

A 28A has a 28-inch band and a A cup, about 1 inches between band and bust. In the UK it is 28A, in Australia 6A and in Europe 60A.

US
28A
UK
28A
AU
6A
EU
60A
FR
75A

Also fits (sister sizes): 30AA looser band · all same-volume sizes ↓

28A measurements

Snug underbust
28–29 in · 71–74 cm
Bust, fullest part
about 29 in · 72–75 cm
Cup difference
1 in (A cup)

These are starting points from the band-and-cup method. Brands differ by about a size, so a two-minute measurement beats any chart.

28A sister sizes

Same cup volume, different band. If a 28A band feels too loose, go down a band and up a cup; if it feels tight, go up a band and down a cup.

28A = UK 28A · AU 6A · EU 60A · FR 75A. Sister sizes: 30AA. 28A in full →
A
B
C
D
DD
DDD
G
H
28
30
32
34
36
38
40
42
44
28A30AA

If a 28A doesn't fit

Spilling over the cups
Try 28B

Not sure what's wrong? Run through the 4-point fit check.

Sizes next to 28A

28A questions

What is the sister size of 28A?

30AA (one band up, one cup down). Sister sizes hold the same cup volume on a different band.

What is 28A in UK, Australian and European sizes?

UK 28A, Australia 6A, Europe 60A and France 75A. US and UK cup letters match up to DD and then split.

What measurements are a 28A?

A snug underbust of about 28–29 in (71–74 cm) and a bust of about 29 in (72–75 cm). Measure with the tape level and use the calculator for an exact result.

Is 28A a big size?

28A has a small cup volume for a 28 band. Cup letters only mean something next to the band: a 28A holds the same as 30AA.