Chest measurement → top size
Enter your chest measurement to get your top size in FR, US and UK systems.
Bust/chest circumference is the reference measurement for top sizes: sweaters, shirts, t-shirts, dresses, jackets. It is the loop measured at the widest point of the chest, under the armpits. European sizes (36, 38, 40...) are defined by 4 cm increments of chest circumference.
Women and men use different scales: a French women's 40 corresponds to a 92-95 cm chest, while a French men's 48 corresponds to 95-100 cm. Our table covers both and includes US, UK and letter (XS-XXL) equivalences.
- Stand straight, arms relaxed at your sides.
- Wrap the tape measure around the chest at the fullest point (women: at the bust line; men: under the armpits).
- Keep the tape horizontal all the way around, snug but not tight.
- Exhale normally before reading the measurement in cm.
Women — Reference table
| Chest circumference (cm) | FR / EU | US | UK | Letter size |
|---|---|---|---|---|
| 80–83 | 34 | 0 | 6 | XS |
| 84–87 | 36 | 2 | 8 | XS-S |
| 88–91 | 38 | 4 | 10 | S |
| 92–95 | 40 | 6 | 12 | M |
| 96–99 | 42 | 8 | 14 | L |
| 100–103 | 44 | 10 | 16 | XL |
| 104–107 | 46 | 12 | 18 | XXL |
| 108–115 | 48 | 14 | 20 | 3XL |
| 116+ | 50 | 16 | 22 | 4XL |
Frequently asked questions
Should I wear a bra when measuring?
Women: wear an unpadded well-fitting bra for a natural measurement. Men: bare-chested or in a thin t-shirt. Avoid thick clothing (sweater, hoodie) which skews the measurement.
Difference between chest and bust circumference?
Chest/bust circumference is measured at the widest point (bust line for women). Underbust is just under the bust. Both are used for bra size calculation.
How do I convert a US or UK size?
Our table gives the direct correspondence. Quick approximations: US size = FR - 32 (women) or - 36 (men). UK size = FR - 28 (women). But correspondence is not linear, use the table for exact values.
Why am I lost in some brands at the same size?
Brands use slightly different scales. A size 40 at Zara may be a 38 at Mango. Always check the brand-specific size chart when buying online.