How to Determine Your Correct Bra Size at Home

Quick Answer

To find your correct bra size at home, you need a soft measuring tape and a mirror. Measure your band size by wrapping the tape snugly around your ribcage, then measure your bust at the fullest part. Subtract the band measurement from the bust measurement to determine your cup size. For best accuracy, measure while wearing a non-padded bra or no bra, and repeat each measurement twice.

Finding the right bra size can feel like a guessing game, but it doesn't have to be. Many women wear the wrong size without realizing it, leading to discomfort, poor support, and even back pain. The good news is that you can determine your correct bra size at home with just a few simple measurements and a little know-how.

In this guide, we'll walk you through the process step by step, highlight common mistakes to avoid, and share tips for ensuring a comfortable, flattering fit. Whether you're shopping for a new everyday bra or a special occasion piece, knowing your size is the first step to feeling confident and supported.

What You'll Need

Before you start, gather a soft measuring tape (the kind used for sewing), a mirror, and a non-padded bra or go braless for the most accurate results. If you don't have a soft tape, you can use a piece of string and a ruler, but a flexible tape is easiest.

Wear a lightly lined or unpadded bra that doesn't add bulk or change your natural shape. This ensures your measurements reflect your true size, not the size of the bra you're wearing.

• Soft measuring tape
• Mirror
• Non-padded bra or no bra

Step-by-Step Measuring Process

Start by measuring your band size. Wrap the tape around your ribcage, just under your bust. Keep it snug but not tight, and make sure it's level all the way around. Exhale and take the measurement in inches. If the number is even, add 4 inches; if it's odd, add 5 inches. This gives you your band size. For example, if you measure 30 inches, your band size is 34.

Next, measure your bust size. Wrap the tape around the fullest part of your bust, keeping it parallel to the floor. Don't pull too tight—the tape should rest comfortably without squishing. Record this number in inches.

Now, subtract your band measurement from your bust measurement. The difference determines your cup size: 1 inch = A, 2 inches = B, 3 inches = C, 4 inches = D, 5 inches = DD/E, and so on. For instance, if your bust measures 38 inches and your band is 34, the 4-inch difference means you're a 34D.

• Band size: measure underbust, add 4-5 inches
• Bust size: measure at fullest point
• Cup size: difference between bust and band

Common Mistakes to Avoid

One of the most common mistakes is measuring over a padded bra, which adds volume and skews the results. Another is holding the tape too loosely or too tightly. The tape should be parallel to the floor and snug enough to stay in place without leaving marks.

Also, don't rely on the size from an old bra. Brands and styles vary, and your body changes over time. Always measure fresh, and if you're between sizes, consider sizing up for comfort or down for more support.

• Measure over a non-padded bra or no bra
• Keep tape snug but not tight
• Don't rely on old bra sizes

Quick Fit Checklist

1. Band is level and snug: The band should sit horizontally around your ribcage, not riding up in the back. You should be able to slide two fingers under the band comfortably. If the band rides up, go down a band size.
2. Cups contain without spillage: Your breasts should sit fully inside the cups, with no overflow at the top or sides. The center gore (the piece between cups) should lie flat against your sternum. If you see spillage, try a larger cup size.
3. Straps stay in place without digging: Straps should be adjusted so they don't slip off your shoulders but also don't dig in. Most support should come from the band, not the straps. If straps dig, loosen them; if they slip, tighten or consider a smaller band.

Finding the Right Bra for Your Size

• Julie's Roses Full Figure Underwire Bra - Butterfly Blue: The bra features a rose embroidery over sheer mesh with satin cups, additional lift and support from the concealed tulle sling inside the cups and wide satin straps for extra support. If you have a larger bust, this bra's concealed sling and wide straps provide the extra support you need, making it a great option once you know your correct size.
• Savoir Faire Full Figure Underwire Bra - Turquoise: The Savoir Faire Full Figure Bra is a lightly padded lace underwire bra made from a beautiful eyelash lace and soft mesh. For those who prefer a lightly padded option, this bra offers shape and coverage while still accommodating full figure sizing.

Knowing your correct bra size is the foundation for a comfortable and supportive wardrobe. By measuring at home and using our fit checklist, you can shop with confidence and choose bras that flatter your figure. Remember to re-measure periodically, as your size can change with weight fluctuations, exercise, or life events.