Is 34B a Small or Medium Bra Size? Balanced Volume & Styling Tips
34B balances a mid-size band with moderate cup depth, landing between petite and medium categories.
Fast facts about 34B
- Band 34 suits snug underbust measurements around 32–33 inches.
- B cups equal roughly a 2 inch difference between bust and band, providing modest-but-noticeable volume.
- On most medium frames it looks natural, while petite builds may see a fuller effect.
- Sister sizes 32C and 36A let you adjust band tension without sacrificing cup space.
How 34B is measured
Band fit
Aim for a 32–33 inch snug underbust so the band stays level yet comfortable.
Cup depth
Expect around 36 inches at the fullest point—two inches beyond the band measurement.
Support focus
Light foam or seamed cups keep shape defined; flexible wires preserve comfort for daily wear.
34B bust size in inches
Match your inch measurements to this checklist to confirm a true 34B before adjusting styles or sister sizes.
| Measurement | Typical inches | How to capture it |
|---|---|---|
| Snug band (ribcage) | 32–33 in | Measure firmly under the bust and round to the 34 band label for bra tags. |
| Standing bust | 35.5–36.5 in | Keep the tape level at the fullest bust point; avoid squeezing tissue flat. |
| Band-to-bust difference | ≈2 in | Subtract the snug band from the standing bust to confirm the classic B-cup gap. |
| Approx. cup depth | 7.5–8.0 in | Measure from the wire base to nipple on a favourite bra to check how much cup height you need. |
- Leaning bust measurements around 37 in ensure there's enough tissue to fill the upper cup edge.
- If your bust sits nearer 35 in but cups still gap, try the 32C sister size for more depth.
- A loose tape or posture change can push you toward 34A or 34C, so remeasure when weight shifts.
34B inch quick reference
- 34B ≈ 34 band label, 36 in bust, two-inch cup difference.
- Sister matches: 32C for a tighter band, 36A for a relaxed fit.
- International equivalents: EU 75B, FR 90B, UK 34B, JP 75B.
Different fabrics stretch differently—check band tension after a few wears and adjust if needed.
How 34B tends to look
The size delivers a smooth, lightly rounded silhouette.
- T-shirt bras disappear under knits and work shirts.
- Unlined lace styles add texture while maintaining an understated profile.
- On athletic builds, subtle push-ups give evening outfits a touch more curve.
- Supportive sports bras with encapsulation minimise bounce during workouts.
Sister size playbook
- Move to 32C if the band creeps upward or feels loose by midday.
- Try 36A when you want additional breathing room around the ribcage.
- Size up to 34C if the neckline cuts in or you want extra cup coverage.
Fit checks before you buy
- Keep the band parallel to the floor on the middle hook for lasting support.
- Check the cup edge lies flat—molded or darted cups suit shallow roots.
- Adjust straps so they anchor the cup without digging; moderate tension prevents slipping.
- Look for side-support panels if tissue tends to shift toward the underarm.
Common 34B questions
Is 34B a small or medium size?
It straddles small-to-medium territory—larger than 34A, yet below the 36C/36D sizes many retailers cite as average.
What if 34B cups feel shallow?
Test the 34C or 32C sister sizes, or choose balconette and three-part cups for extra depth.
Which bra styles flatter 34B most?
Contoured T-shirt bras for daily wear, light push-ups for lift, and flexible wireless options for lounging all complement 34B.
What is the bust size for 34B in inches?
Record 32–33 inches snug under the bust (rounded to a 34 band) and about 35.5–36.5 inches at the fullest bust. The roughly two-inch gap indicates a B cup, but double-check posture and tape placement for accuracy.
Dial in your 34B fit
Double-check measurements, review the dedicated size guide, and compare visuals in the perception guide for outfit planning.