Every body is different. Enter your measurements and get your recommended size in EU, UK & US — so your lingerie fits beautifully, first time.
✨ Smart Size Calculator
Enter your measurements in centimetres for an accurate result
cm
Measure snugly around your ribcage, just below your bust
cm
Measure across the fullest part of your bust, without pulling the tape tight
1Bust: The fullest part of your chest
2Underbust: Just below your breasts, around your ribcage
Your recommended size
75B
European Size (EU)
FR Size90B
UK Size34B
US Size34B
cm
Measure around the widest part of your hips and bottom
1Hips: The widest point of your hips and bottom
Your recommended size
M
Standard size
EU Size38
FR Size40
UK/US10
cm
cm
cm
For bodies and corsets, we use your largest measurement to recommend the size that will give you the best comfort and fit.
Your recommended size
M
Body / Corset Size
cm
cm
Nightwear is typically cut with a little extra ease for all-night comfort. We recommend a size based on your largest measurement.
Your recommended size
M
Nightwear / Chemise Size
Measuring Guide
How to Take Your Measurements Correctly
1
Wear an unpadded bra
For the most accurate result, measure wearing your best-fitting non-padded bra — or measure without one entirely.
2
Use a soft tape measure
Keep the tape level and parallel to the floor. It should sit flat against your body — firm but not tight.
3
Record in centimetres
European lingerie uses centimetres. Jot each measurement down carefully before entering it into the calculator.
4
Measure 2–3 times
A couple of repeat measurements make all the difference. Take each one two or three times and use the average for the best result.
Reference Charts
International Size Conversion
Bra Band Conversion
Find your underbust measurement across international sizing systems
Underbust (cm)
EU
FR/ES
UK
US
63–67
65
80
30
30
68–72
70
85
32
32
73–77
75
90
34
34
78–82
80
95
36
36
83–87
85
100
38
38
88–92
90
105
40
40
93–97
95
110
42
42
Cup Size Conversion
Based on the difference between your bust and underbust measurements
Difference (cm)
EU Cup
UK Cup
US Cup
10–12
A
A
A
12–14
B
B
B
14–16
C
C
C
16–18
D
D
D
18–20
E
DD
DD/E
20–22
F
E
DDD/F
22–24
G
F
G
Good to know: Sizing can vary slightly between brands. Always check the individual size guide in each product description for Gaia, Axami and Gorteks.
Knickers & Thongs
Based on your hip measurement
Size
Hips (cm)
EU
FR
UK/US
XS
84–88
34
36
6
S
88–92
36
38
8
M
92–96
38
40
10
L
96–100
40
42
12
XL
100–104
42
44
14
2XL
104–110
44
46
16
3XL
110–116
46
48
18
Dresses & Nightwear
For chemises, robes, pyjamas and nightdresses
Size
Bust
Waist
Hips
EU
UK
XS
80–84
60–64
86–90
34
6
S
84–88
64–68
90–94
36
8
M
88–92
68–72
94–98
38
10
L
92–96
72–76
98–102
40
12
XL
96–100
76–80
102–106
42
14
2XL
100–106
80–86
106–112
44
16
Expert Tips
How to Know Your Lingerie Fits Properly
The band does 80% of the work
Your bra band should be firm and level on the loosest hook when new, so you can tighten it as the fabric stretches over time. If you need the tightest hook straight away, size down on the band.
Cups should be smooth, not strained
No spillage, no gaps. The underwire should sit flat against your ribcage — never on breast tissue. A well-fitted cup fully encases your bust without digging in or puckering.
Sister sizes are your secret weapon
If your 34C feels too tight in the band, try a 36B — same cup volume, wider band. Going up a band size means going down a cup size. This little-known trick can transform your fit without changing your look.
Brand-Specific Sizing
Each European brand has its own cut and fit characteristics. For a truly precise fit, always refer to the individual size guide in each product description.
Knowing your exact lingerie size is essential for comfort, support, and everyday confidence. At Secretelles, we understand that European lingerie sizing differs from UK and US standards — which is why we've built this interactive bra size calculator and comprehensive lingerie size guide to take the guesswork out of buying online.
Our interactive calculator instantly converts your measurements into EU, UK and US sizes. Whether you're shopping for a push-up bra, lace knickers or a luxury chemise, knowing your size is the single biggest factor in getting lingerie that looks and feels right.
Use this guide as your starting point, then check the individual brand size charts in each product listing for the most precise fit possible.
Still unsure about your size? Our lingerie experts are happy to help you find the right fit.
