Size guide bras

Did you know?

70% of women don't know their bra size and cup size.

However, a well-chosen and correctly sized bra allows you to feel good all day long and preserves the elasticity of your breasts.

To enhance your figure and feel good every day, all you need is a tape measure and follow the guide!

To determine your bra size, you will need to take two measurements without clothing and without pulling your tape measure too tightly .

1 Bust circumference
The bust measurement should be taken under the bust, where your bra sits on the back. The tape measure should be placed horizontally without being tight. The measurement of your bust measurement will give you your back measurement .
2 Chest size
The chest measurement should be taken at the tip of the breasts to determine the cup size that suits you. The tape measure should be placed horizontally without being tight on the chest. The chest measurement will give you your cup size .

Once you have both of your measurements, refer to the chart below to find your bra size. Start by determining your back size, then refer to the corresponding column to determine your cup size.

Measure 2
Bust circumference in cm Chest size in cm / Cup depth Back circumference
HAS B C D E F G H
Measure 1 63-67 76.5-78.5 79-81 81.5-83.5 84-86 86.5-88.5 89-91 91.5-93.5 94-96 80
68-72 81.5-83.5 84-86 86.5-88.5 89-91 91.5-93.5 94-96 96.5-98.5 99-101 85
73-77 86.5-88.5 89-91 91.5-93.5 94-96 96.5-98.5 99-101 101.5-103.5 104-106 90
78-82 91.5-93.5 94-96 96.5-98.5 99-101 101.5-103.5 104-106 106.5-108.8 109-111 95
83-87 96.5-98.5 99-101 101.5-103.5 104-106 106.5-108.5 109-111 114-116 114-116 100
88-92 101.5-103.5 104-106 106.5-108.5 109-111 111.5-113.5 114-116 116.5-118.5 119-121 105
93-97 106.5-108.5 109-111 111.5-113.5 114-116 116.5-118.5 119-121 121.5-123.5 124-126 110
98-102 111.5-113.5 114-116 116.5-118.5 119-121 121.5-123.5 124-126 126.5-128.5 129-131 115
103-107 116.5-118.5 119-121 121.5-123.5 124-126 126.5-128.5 129-131 131.5-133.5 134-136 120
108-112 121.5-123.5 124-126 126.5-128.5 129-131 131.5-133.5 134-136 136.5-138.5 139-141 125
113-117 126.5-128.5 129-131 131.5-133.5 134-136 136.5-138.5 139-141 141.5-143.5 144-146 130

For example, if you measure 75cm around your bust (measurement 1) and 96cm around your chest (measurement 2), your bra size is 90D.

Size correspondence

This chart shows other sizes that may fit you:

85A 85B 85C 85D 90A 90B 90C 95A 95B 95C 100A 100B 105B 110B
Universal sizes 1 1 2 2 2 2 2 2 3 3 4 4 5 6
XS XS S S S S S M M M L L XL XXL

For example, if your bra size corresponds to an 85B, you also correspond to a size 1.

Please note: The design team informs you that Maison Lejaby bras marked in universal sizes are not suitable for generous busts.

To discover our other size guides

Now that you know your Maison Lejaby bra size, we invite you to discover your size for our other items!

Lingerie Size Guide

Questions fréquentes

Comment savoir si mon soutien-gorge est trop petit ou trop grand ?

Un soutien-gorge est trop petit si la poitrine déborde des bonnets, si les armatures compriment ou si le tour de dos serre excessivement. Il est trop grand lorsque les bonnets plissent, que les bretelles glissent ou que la bande remonte dans le dos.

Quelle différence entre le tour de dos et le tour de poitrine ?

Le tour de dos se mesure juste sous la poitrine et détermine le chiffre de votre taille. Le tour de poitrine se mesure à l’endroit le plus fort de la poitrine. La différence entre ces deux mesures permet de déterminer la profondeur du bonnet.


Par exemple, dans une taille 90C, le chiffre 90 correspond à la taille du tour de dos selon le système français, tandis que la lettre C indique la profondeur du bonnet. Ainsi, deux femmes portant un bonnet C peuvent avoir des volumes de poitrine différents selon leur tour de dos.

Pourquoi ma taille de soutien-gorge change-t-elle au fil du temps ?

La poitrine évolue naturellement sous l’effet des variations hormonales, de l’âge, de la grossesse, de l’allaitement, de l’activité physique ou des changements de poids.

À quelle fréquence faut-il refaire ses mesures ?

Il est recommandé de mesurer son tour de dos et son tour de poitrine tous les 12 à 18 mois, ainsi qu’après une variation de poids, une grossesse ou tout changement important de la silhouette.

How do you know if you're wearing the right bra size?

Signs you're wearing the wrong bra size

Wearing the correct bra size is essential for optimal support and lasting comfort. A well-fitting bra supports the bust without compressing it, while the band remains level and parallel to theground. To determine your exact bra size, you need to measure both your underbust and bust measurements, then refer to our Size Guide. Several signs can indicate that your bra doesn't fit properly. If the band rides up at the back, your band size is probably too large. Conversely, if the band feels overly tight or leaves marks, it may be too small. The cups should fully enclose the bust without gaping or overflowing. If your breasts spill over the cups or at the neckline, opt for a larger cup size. If the cups wrinkle or gape, try a smaller cup size. The straps should not dig into your shoulders, and the underwires should fully surround the breasts without pressing into the tissue or causing discomfort under the arms.

When should you check your bra size again?

Your bust size can naturally change over time. Weight fluctuations, pregnancy, breastfeeding, hormonal changes or intensive physical activity can all affect your measurements. For this reason, we recommend measuring yourself every 12 to 18 months, or whenever your usual bras begin to feel less comfortable.

French, European or UK bra sizes: how do you find the right one?

Bra sizing systems vary from country to country. A French size does not correspond exactly to a European or UK size, as both the band measurements and cup lettering differ between systems. Before purchasing from an international brand, always check its size conversion chart. At Maison Lejaby, our Size Guide helps you determine your size using the French sizing system.

Choosing the right bra for your shape

Beyond size, the style of your bra should suit both your bust shape and your preferences. Underwired bras, wireless bras, balconette bras and triangle bras each provide a different level of support and create a different neckline. For fuller busts, discover our full-cup and fuller-bust bras, expertly designed to combine comfort, support and elegance. You can also explore our Body Shape Guide to help you find the styles that best complement your silhouette.