100 cm Bust Bra Size
A 100 cm bust (≈ 39.4″) is not one size: the cup depends on the underbust. Slide to yours; the table shows every size a 100 cm bust can be.
My bust is 100 cm: what's my size?
Why the EU label isn't your centimeters. An 84 cm underbust is a US 34 band, which the EU labels 75: the label follows US × 2.5 − 10, not the raw reading. That is why a converted size can feel a step off from a bra drafted natively in EU sizing.
Bra sizes for a 100 cm bust, by underbust
| Underbust | US band | Difference | US size | EU · FR · UK |
|---|---|---|---|---|
| 70 cm · 27.6″ | 28 | 11″ | 28K | 60K · 75K · 28H |
| 73 cm · 28.7″ | 30 | 9″ | 30I | 65I · 80I · 30G |
| 76 cm · 29.9″ | 30 | 9″ | 30I | 65I · 80I · 30G |
| 79 cm · 31.1″ | 32 | 7″ | 32G | 70G · 85G · 32F |
| 82 cm · 32.3″ | 32 | 7″ | 32G | 70G · 85G · 32F |
| 85 cm · 33.5″ | 34 | 5″ | 34DD | 75E · 90E · 34DD |
| 88 cm · 34.6″ | 36 | 3″ | 36C | 80C · 95C · 36C |
| 91 cm · 35.8″ | 36 | 3″ | 36C | 80C · 95C · 36C |
| 94 cm · 37.0″ | 38 | 1″ | 38A | 85A · 100A · 38A |
| 97 cm · 38.2″ | 38 | 1″ | 38A | 85A · 100A · 38A |
One bust, many sizes: the underbust decides how much of 100 cm is frame and how much is cup.
100 cm bust: answered
What bra size is a 100 cm bust?
It depends on the underbust. 100 cm is about 39.4 inches; each 2.5 cm above the band is one cup letter. Use the table above with your underbust in cm.
What is 100 cm bust in inches?
About 39.4 inches.
Is the EU band the same as my underbust in cm?
No. EU labels follow US band × 2.5 − 10; an 84 cm underbust is EU 75, not 85.
Opens HauteFlair’s own hub page; use your measured size there. HauteFlair is owned by the same company as Brasize.ai; that relationship never changes the sizing math, charts, or fit advice on this page. How this site makes money.