Knix Bra Size Chart
Enter your measurements for your exact Knix size — then convert to UK, EU & AU.
Size chart — US · UK · EU · AU
Data verified Apr 2026 · Official size guide · See an error? Report it
Own a Knix bra? Tell us how it fitPicking the Right Knix Bra in Your Size
Own a Knix bra? Tell us how it fit.
Your report helps the next person find their size. Anonymous, no login.
Baseline: Knix generally runs true to size — most buyers keep their usual size.
Not enough user reports at Knix yet to show a most-common size. Help by adding yours.
What size Knix bra should I get?
Knix's WingWoman Contour Bra uses standard band-and-cup sizing (bands 28–48, cups A–H), so your usual US size carries over — a 34C stays a 34C. Most wireless and everyday Knix styles use an alpha scale (XS–XXXXL++); match your band and cup to Knix's size guide. Knix runs true to size, but the wireless band feels snug for the first few wears, then relaxes — don't size up on day one.
- WingWoman (band + cup)
- Bands 28–48, cups A–H
- Wireless / everyday
- XS–XXXXL++ (alpha)
- Example
- US 34C = Knix 34C
- Fit
- True to size
Knix Size Equivalents
Common Knix bra sizes converted to UK, EU, and AU sizing.
| US | UK | EU | AU |
|---|---|---|---|
| 32C | 32C | 70C | 10C |
| 34B | 34B | 75B | 12B |
| 34C | 34C | 75C | 12C |
| 34D | 34D | 75D | 12D |
| 36C | 36C | 80C | 14C |
| 36D | 36D | 80D | 14D |
Need a different size? Use the full Knix size chart above or the calculator for your exact measurements.
Knix Sister Size Chart
Sister sizes share the same cup volume on a different band length. If your Knix band rides up or feels loose, try the tighter-band sister; if it digs in, try the looser-band sister — the cups hold the same.
| Your size | Tighter band | Looser band |
|---|---|---|
| 32B | 30C | 34A |
| 32C | 30D | 34B |
| 32D | 30DD | 34C |
| 34B | 32C | 36A |
| 34C | 32D | 36B |
| 34D | 32DD | 36C |
| 34DD | 32DDD | 36D |
| 36B | 34C | 38A |
| 36C | 34D | 38B |
| 36D | 34DD | 38C |
— means Knix doesn't make that sister size.
Need a size we didn't list? Use the interactive sister size chart.
How Knix Sizing Compares
If you wear a 34C in Knix, here's your likely size in other popular brands:
| Brand | US Size | UK Size | EU Size | Fit |
|---|---|---|---|---|
| Knix | 34C | 34C | 75C | true to size |
| Victoria's Secret | 34C | 34C | 75C | true to size |
| Calvin Klein | 34C | 34C | 75C | true to size |
| ThirdLove | 34C | 34C | 75C | true to size |
| Savage x Fenty | 34C | 34C | 75C | true to size |
| Wacoal | 34C | 34C | 75C | true to size |
Sizes shown use standard charts. Actual fit may vary by style — always check the brand's specific size guide.
Knix Sizing & Fit Guide
Knix bras run true to size. The WingWoman Contour Bra uses standard band-and-cup sizing (bands 28–48, cups A–H), while most wireless and everyday styles use Knix's own alpha-plus scale (XS through XXXXL++) found via their on-site size guide. Because the bras are wireless, the band feels snug for the first few wears and washes, then relaxes — don't size up on day one.
How to measure for a Knix bra