34B bra size: chest and cup measurements, sister sizes in inches and cm, example of celebrity breasts

According to our data, 1.71% of women in the United States, or 2,318,235 people, have this size. Among them: Adriana Lima, Rihanna, Lady Gaga . Below you will learn how size 34B differs from sizes 34A, 36A, 32B, 36B, 32C, 34C. Find out why it’s smaller than average.

How many inches and centimeters in 34B bra size

	in	cm
Bust measurements (US+0\ UK+0)	35 – 38	89.9 – 96.5
Underbust measurements (US+0\ UK+0)	33 – 35	83.8 – 89.9
Bust (US+4\ UK+4)	31 – 34	78.7 – 86.3
Underbust (US+4\ UK+4)	29 – 31	73.6 – 78.7

Bra size (US+0\UK +0 system)	Cup diameter	Volume of one cup	Weight of both breasts
34B	11.4 cm (4+1⁄2 in)	390 cm3 (24 cu in)	0.70 kg (1.5 lb)

Examples of what size 34B breasts look like in celebrities

1. Adriana Lima

alima6 by michaeldonovan1, on Flickr. *Attribution 2.0 Generic (CC BY 2.0)*

2. Rihanna

Rihanna Haistyles and Haircuts by celebrityabc, on Flickr. Attribution-ShareAlike 2.0 Generic (CC BY-SA 2.0)

3. Lady Gaga

Lady Gaga by Christine Gervais, on Flickr. Attribution 2.0 Generic (CC BY 2.0)

34B VS other sizes

vs 32B: The 32B bra has 2 inches less band. And the cup volume is slightly smaller.
vs 36B: The 36B bra has 2 inches more band. And the cup volume is slightly larger.
vs 34A: The 34A bra has the same band size. But the cup volume is smaller.
vs 34C: The 34C bra has the same band size. But the cup volume is larger.
vs 32C: It’s a sister size. The 32C bra has the same cup volume. But the band is a little tighter.
Vs 36A: It’s a sister size. The 36A bra has the same cup volume. But the band is a little looser.

34B sister size chart

	Sister size down	Current bra size	Sister size up
US/UK	32C	34B	36A

Is 34B big, small or medium?

Both size 34B breasts weigh 1.5 lbs (0.70 kg). The volume of one breast is 24 cubic inches (388 cm3). This is the volume and weight of 8.74% of women in the United States, or 11,856,114 people.

The number of women with smaller breasts is 17.38%. 34B is conventionally smaller than the average size.

11.63% of women in the United States have a B cup size. 14.74% have a smaller cup size. The B cup size is conventionally smaller than the average cup size.

34B equivalents

US+0/UK+0 system:

EU (Europe) – 85AA
FR/BE/ES – 100AA
AU/NZ – 16AA
JP/KO – 85AA
IT – 5AA
UK+4/US+4 – 38AA

US+4/UK+4 system:

EU (Europe) – 75A
FR/BE/ES – 90A
AU/NZ – 12A
JP/KO – 75B
IT – 3A
UK+0/US+0 – 30DD

What size sports bra for 34B

34B (US+0/UK+0 system) = M

34B (US+4/UK+4 system) = XS