Bra Measurement Chart: International Band and Cup Reference
Reference underbust and bust measurements in inches and centimeters with common US, UK, EU, French, Australian and Japanese band conventions.
International Band Reference
These are common labeling conversions, not measurements mandated for every commercial bra. ISO 8559-1 provides standardized definitions for anthropometric measurements used in clothing sizing; it does not prescribe one universal bra-size conversion table.
| Approx. Underbust | US / UK | EU / Common Japan | AU | FR / ES | Italy |
|---|---|---|---|---|---|
| 27–29" / 68–74 cm | 28 | 60 | 6 | 75 | 0 |
| 29–31" / 74–79 cm | 30 | 65 | 8 | 80 | 1 |
| 31–33" / 79–84 cm | 32 | 70 | 10 | 85 | 2 |
| 33–35" / 84–89 cm | 34 | 75 | 12 | 90 | 3 |
| 35–37" / 89–94 cm | 36 | 80 | 14 | 95 | 4 |
| 37–39" / 94–99 cm | 38 | 85 | 16 | 100 | 5 |
| 39–41" / 99–104 cm | 40 | 90 | 18 | 105 | 6 |
| 41–43" / 104–109 cm | 42 | 95 | 20 | 110 | 7 |
| 43–45" / 109–114 cm | 44 | 100 | 22 | 115 | 8 |
Cup-Difference Reference
This simplified table follows the measurement-difference convention used by this site. International cup lettering is not fully standardized across manufacturers, particularly at larger cup sizes.
| Difference | US | UK | EU | AU |
|---|---|---|---|---|
| 1" / 2.5 cm | A | A | A | A |
| 2" / 5.1 cm | B | B | B | B |
| 3" / 7.6 cm | C | C | C | C |
| 4" / 10.2 cm | D | D | D | D |
| 5" / 12.7 cm | DD | DD | E | DD |
| 6" / 15.2 cm | DDD / F | E | F | E |
| 7" / 17.8 cm | G | F | G | F |
| 8" / 20.3 cm | H | FF | H | FF |
Frequently Asked Questions
Answers about sizing methods, measurements, and fit considerations.
How do French and Spanish band numbers compare with EU numbers?
A common convention is FR/ES = EU + 15. For example, EU 70 is commonly labelled FR 85. Always confirm the product chart because labeling can vary.
What is the Australian band convention?
A common Australian convention uses dress-size numbers: UK/US 28, 30, 32, 34, 36 and 38 correspond approximately to AU 6, 8, 10, 12, 14 and 16.
Sources & Standards
- ISO 8559-1:2017, Size designation of clothes — Part 1: Anthropometric definitions for body measurement
- White & Scurr (2012), Ergonomics, DOI 10.1080/00140139.2011.647096