How to Measure Your Bra Size at Home (The Right Way)

Finding your correct bra size can completely change how your bras fit, feel, and support you throughout the day. Many women are wearing the wrong size without realizing it—often adjusting straps or settling for discomfort when the real issue is fit.

Measuring at home is a great starting point, and with a few simple steps, you can get closer to a size that truly works for your body.

What you’ll need

• A soft measuring tape
• A non-padded bra (or no bra)
• A mirror (optional, but helpful)

Step 1: Measure your band size

Wrap the measuring tape snugly around your ribcage, just under your bust.

• Keep the tape level all the way around
• It should feel firm, not loose

If your measurement is:

• Even number → that’s your band size
• Odd number → round up to the next even number

Step 2: Measure your bust

Measure around the fullest part of your bust.

• Keep the tape relaxed—not tight
• Make sure it stays level across your back

Step 3: Calculate your cup size

Subtract your band measurement from your bust measurement.

Each inch difference equals a cup size:

• 1" = A
• 2" = B
• 3" = C
• 4" = D
• 5" = DD/E
• 6" = F
• 7" = G
• 8" = GG/H

Common fit issues to watch for

Even with measurements, fit can vary by brand and style. Here are a few signs your bra may not be the right size:

• Straps constantly slipping
• Band riding up in the back
• Cups gaping or digging in
• Spillage at the top or sides

These are often signs of a size or style mismatch—not something you just have to live with.

A fitter’s tip

Measurements are a guide—but they’re not the full story.

A well-fitting bra should:

• Sit level across your back
• Stay in place without constant adjusting
• Support from the band, not just the straps
• Feel secure but comfortable

Different brands and styles can fit differently, especially for fuller busts or unique shapes.

When to consider a professional fitting

If you’ve measured yourself but still struggle to find the right fit, a professional fitting can make all the difference.

At Belle Lacet Lingerie, we offer complimentary bra fittings designed to help you find styles that truly work for your body—not just a number on a tag. Most women we fit discover they’ve been wearing the wrong size, and the difference is immediate.

If you’re in the Phoenix area, a personalized fitting can take the guesswork out of sizing and help you feel confident in what you’re wearing every day.

Final thoughts

Measuring at home is a great first step toward better support and comfort. With the right size and the right style, your bra should feel like it’s working with you—not against you.

Wondering how your bra should actually feel? Read our guide on how tight a bra band should be.