Calvin Klein vs ThirdLove Bra Size Comparison
Wondering how Calvin Klein and ThirdLove bra sizes compare? Both brands use standard US bra sizing, so a 34C should be the same measured size in either brand. But fit, size range, and style vary — here's a detailed breakdown to help you find your perfect size in both.
Calvin Klein
Everyday bras
ThirdLove
Everyday bras
Size Chart: Calvin Klein vs ThirdLove
Common bra sizes compared across US, UK, and EU systems for both brands.
| US Size | Calvin Klein UK | Calvin Klein EU | ThirdLove UK | ThirdLove EU | Bust (cm) |
|---|---|---|---|---|---|
| 32B | 32B | 70B | 32B | 70B | 85 |
| 34B | 34B | 75B | 34B | 75B | 90 |
| 34C | 34C | 75C | 34C | 75C | 93 |
| 34D | 34D | 75D | 34D | 75D | 95 |
| 36C | 36C | 80C | 36C | 80C | 98 |
| 36D | 36D | 80D | 36D | 80D | 100 |
| 38DD | 38DD | 85E | 38DD | 85E | 108 |
Both brands use standard US bra sizing. UK and EU equivalents follow the same conversion.
How Calvin Klein and ThirdLove Fit Differently
Both Calvin Klein and ThirdLove run true to size, so your size should translate directly between the two brands. The fit differences come down to style and construction rather than sizing.
Calvin Klein Fit
Calvin Klein bras generally run true to size. Their Modern Cotton bralettes use S/M/L sizing that runs slightly small — size up if between sizes. Underwire bras fit standard.
ThirdLove Fit
ThirdLove is known for their half-cup sizes (e.g., 34.5B) which provide a more precise fit between standard cup sizes. Their bras tend to run true to size with a focus on comfort.
Does Calvin Klein or ThirdLove Run Bigger?
Neither brand runs significantly bigger or smaller. Both Calvin Klein and ThirdLove fit true to size, so your size should transfer directly. The perceived fit difference comes from construction — different materials and padding levels affect how the same size feels on your body.
Size Range Comparison
| Calvin Klein | ThirdLove | |
|---|---|---|
| Size range | 30A–38DD | 30A–48H |
| Fit | True to size | True to size |
| Focus | Everyday | Everyday |
Which Brand Is Right for You?
Choose Calvin Klein if you want:
- ✓ Comfortable everyday wear
- ✓ Sizes 30A–38DD
- ✓ Consistent, true-to-size fit
Choose ThirdLove if you want:
- ✓ Comfortable everyday wear
- ✓ Sizes 30A–48H
- ✓ Consistent, true-to-size fit
Not sure of your size?
Use our bra size calculator to find your size in Calvin Klein, ThirdLove, and 12 other brands — all from your measurements.
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