What Are Bra Sister Sizes? Tips for Broadening Your Bra Options

What Are Bra Sister Sizes?

Finding the perfect bra fit is crucial not just for comfort—it’s also key to the right support and shape under your clothes. While most of us are familiar with our basic bra size, there’s a lesser-known aspect to bra sizing: bra sister sizes.

Understanding sister sizing can be a game-changer, especially when you're trying to find the best fit in different brands or styles. Here’s what you need to know.

Understanding Bra Sister Sizing

Sister sizing is a method for finding other bra sizes that could fit you depending on the bra size you typically wear. It's based on the principle that as the band size changes, the cup size also changes to accommodate a similar volume. This means that if you go down in the band size, you go up in the cup size and vice versa to find a comparable fit.

How Bra Sister Sizes Work

To calculate your sister sizes, you need to move diagonally across standard bra size charts.

Here’s how it works:

• If you decrease the band size, increase the cup size. For example, if your usual bra size is 34C, your sister size down would be 32D.
• If you increase the band size, decrease the cup size. Continuing from the example, a sister size up from a 34C would be 36B.

These adjustments help you find a bra that might fit better depending on the style or the brand, which can sometimes size their bras slightly differently.

Why Sister Sizing Matters

Figuring out your sister sizes is incredibly useful. First of all, it expands your options significantly, especially if your exact size is out of stock or if a particular style runs smaller or larger than usual. Sister sizing is also beneficial when trying brands that may not carry a wide range of sizes but have near-perfect alternatives that could fit you just right.

Plus, it’s always a good thing to know all the ways to ensure a bra that fits just right.

Tips for Trying Sister Sizes

When you're trying sister sizes, pay special attention to how the bra fits:

• The band should be snug but comfortable, sitting horizontally across your back without riding up.
• The cups should fully encase your breasts without any spillage or gaping.
• Ensure the underwire sits flat against your rib cage and encircles your whole breast.

Keep in mind that while sister sizes can offer a good alternative, they might not work for everyone in every style. It’s important to try them on and assess the comfort and support they offer.

Find Your Perfect SKIMS Fit

Sister sizing can truly make a difference in how you shop for bras. By knowing how to adjust your size according to different brands and styles, you can always find the best fit, even if your usual size is unavailable. Our bra collections cater to diverse body types and preferences, ensuring there’s a comfortable and flattering fit for everyone. We encourage you to explore our full range of SKIMS bras with the concept of sister sizing in mind. But before you do, first make sure you have the right go-to size by trying out our easy Bra Size Calculator.