Reviewed
34I (UK 34G) bra size
A 34I has a 34-inch band and a I cup, about 9 inches between band and bust. In the UK it is 34G, in Australia 12G and in Europe 75I.
- US
- 34I
- UK
- 34G
- AU
- 12G
- EU
- 75I
- FR
- 90I
Also fits (sister sizes): 32J firmer band · 36H looser band · all same-volume sizes ↓
34I measurements
- Snug underbust
- 34–35 in · 86–89 cm
- Bust, fullest part
- about 43 in · 108–110 cm
- Cup difference
- 9 in (I 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.
34I sister sizes
Same cup volume, different band. If a 34I band feels too loose, go down a band and up a cup; if it feels tight, go up a band and down a cup.
If a 34I doesn't fit
- Band rides up at the back
- Try 32J
- Band digs in, cups fit
- Try 36H
- Spilling over the cups
- Try 34J
- Cups gape or wrinkle
- Try 34H
Not sure what's wrong? Run through the 4-point fit check.
34I questions
What is the sister size of 34I?
32J (one band down, one cup up) and 36H (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 34I in UK, Australian and European sizes?
UK 34G, Australia 12G, Europe 75I and France 90I. US and UK cup letters match up to DD and then split.
What measurements are a 34I?
A snug underbust of about 34–35 in (86–89 cm) and a bust of about 43 in (108–110 cm). Measure with the tape level and use the calculator for an exact result.
Is 34I a big size?
34I has a very full cup volume for a 34 band. Cup letters only mean something next to the band: a 34I holds the same as 28L or 30K.