How to find your correct bra size (step by step)

You find your real bra size by measuring two things: your band, snug right under your bust, and your bust at its fullest point. The difference between those two numbers gives you your cup size. If the fit still feels off after that, it's usually not your measurements. It's the style of bra you're wearing.

Why is finding "the right size" so hard?

In a survey of almost 2,900 Monavida customers, more than 32 percent named the underwire as their main complaint. Another 23 percent said their bra pokes, digs in, or cuts. That's not a looks problem: 54 percent of complaints are physical, versus only 11 percent about appearance.

So a bra that "fits" according to the size tag can still hurt in real life. The number on the label doesn't tell you how an underwire, a strap, or a cup behaves once you move, sit down, or have a bigger lunch than usual.

Hard to find the right size and fit, and honestly I don't want underwire anymore

This customer isn't alone. A lot of women figure out, after years of trial and error, that the problem was never their body. It was the underwire itself: it shifts, presses in the wrong spot, or simply never lines up with every move you make.

How do you measure your own bra size, in three steps?

All you need is a measuring tape and a mirror. Do this without a bra, or in a thin bra with no padding, for the most honest result.

• Band size: measure snugly around your ribcage, right under your bust. The tape should sit close without pinching.
• Bust size: measure around the fullest part of your bust, usually at nipple height, with the tape level and not pulled tight.
• Cup size: the difference between the two numbers gives you your cup. The bigger the difference, the bigger the cup.

At Monavida we carry band sizes 32 through 48 and cups B through H, depending on the style. We then convert that bra size into a US size from S to 3XL, because that conversion is exactly what separates a size that "checks out on paper" from a size that actually fits.

Why doesn't a 'correct' size sometimes still feel right?

If your band rides up in the back or your straps cut into your shoulders, that's rarely about your measurements. We go into this in more detail in our article on bra straps that dig into your shoulders.

Another reason: every brand, every style, fits a little differently. A 34C in one brand can fit perfectly as a 34B or 36C in another. That's not a measuring mistake on your part. It's a lack of standardization across the whole industry.

Your posture matters too. When your band sits loose, your straps end up carrying weight that should rest on your ribcage instead. That's why you keep tugging at your bra by the end of the day, even though the label said it was the "right" size.

What can you do if you always fall between two sizes?

If your band and cup never line up exactly with a standard size, what you really need is a bra that moves with you instead of holding you to one fixed shape. That's what wireless bras with memory foam cups are built for: the cup shapes itself to your body, instead of your body having to fold itself into the cup.

The Daily Essential Bra works that way. The memory foam cups adjust to your shape, a 3-inch band takes the weight off your shoulders instead of leaving your straps to do that job, and a double layer of fabric on the side holds everything in place so you don't spill out to the side or front. Since there's no underwire, you don't have to land exactly between two sizes: the material does part of that work for you.

If your size still isn't quite right after measuring, our 30-day perfect fit guarantee has you covered: exchange or return it until it fits the way it should.

Does your size change with weight, your cycle, or age?

Yes, and that's completely normal. Your cup size and band size shift with weight changes, hormonal cycles, pregnancy, and the natural aging of skin and connective tissue. A bra that fits perfectly today might sit just a little differently in a few months.

That's why it's worth rechecking your size every six months to a year, especially after a bigger weight change. A style with some built-in flexibility, like the wireless bras in our wireless bra collection, handles those shifts more easily than a rigid underwire style that only fits one way.

A lot of women who switch to a wireless style notice less pressure on their shoulders and ribs, simply because the band and cup give more room to move instead of being locked into one shape.