How to determine your bra size: a step-by-step guide

Bra size is defined by two key measurements - the bust circumference and the underbust measurement. The next step is to match these to the brand’s size chart and assess the fit based on both feel and garment construction.
Helpful information
11.02.2026
How to determine your bra size: a step-by-step guide

Why detting the right size matters

A properly fitted bra is the foundation of everyday comfort. It affects not only how you look, but also your posture, breast support and overall sense of confidence. Anabel Arto collections include a wide range of lingerie and apparel, so getting your size right is essential: the same figure can look different depending on the style, but everything starts with accurate measurements.

How to take measurements correctly

To understand how to determine your bra size, you need two basic measurements. The first is the bust, taken at the fullest point. The second is the underbust, which determines the band size.

Measurements should be taken while standing upright, with your back straight and without pulling the measuring tape too tightly. The tape should run strictly parallel to the floor. Avoid adding extra slack or tightening too much - both can lead to incorrect sizing and discomfort when worn.

How bra size is structured

A bra size consists of two elements - a number and a letter. The number represents the underbust measurement, while the letter indicates the cup size. The greater the difference between the bust and underbust, the larger the cup volume.

That’s why understanding your bust size is not just about the measurement itself, but also how it relates to the band. The same underbust measurement can correspond to different cup sizes, and this directly affects your choice.

Why the brand size chart matters

Sizing standards can vary between manufacturers, so it’s important to refer to the specific bra size chart of the brand. Anabel Arto provides a detailed sizing guide, along with alignment to international size systems, making online selection much easier.

This is particularly important if you have previously purchased lingerie in another country or from a different brand - your usual size may fit differently.

How to tell if the size is wrong

Even with accurate measurements, it’s essential to assess how the bra fits. There are several clear signs that the size is not correct:

  • the cups press in or, conversely, do not sit flush against the breast

  • wrinkles or gaps appear in the cups

  • the breast spills out or looks distorted

  • the band rides up during movement

  • the underwires dig in or sit away from the body

A well-fitted bra stays in place, does not shift and doesn’t require constant adjustment throughout the day. Most of the support should come from the band, not the straps.

What to consider when shopping online

When ordering lingerie online, it’s important not only to know your size, but also to consider the specifics of each model. Different styles can fit the same body in different ways. At Anabel Arto, this is addressed through product descriptions and fitting recommendations.

If you are between two sizes, it is best to prioritise the band fit and take into account the fabric density and cup shape.

Summary

The correct bra size comes from accurate measurements, understanding how sizing works and checking the fit. By considering your body shape and the brand’s size chart, you are choosing not just lingerie, but everyday comfort that you can truly feel.

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