How to Measure Your Bra Size at Home: A Step-by-Step Guide

Quick Answer

To measure your bra size at home, you'll need a soft measuring tape and a mirror. Measure your band size by wrapping the tape snugly around your ribcage, just under your bust. Then measure your bust at the fullest part. Subtract the band measurement from the bust measurement to find your cup size. Use a bra size calculator or the chart below to determine your size.

Finding a well-fitting bra can be a game-changer for comfort and confidence. But many women wear the wrong size without realizing it. The good news: you can measure your bra size at home in just a few minutes with a soft measuring tape and a mirror.

This guide walks you through each step, highlights common mistakes, and explains how to use your measurements to find your perfect fit. We'll also share how certain bra styles, like those from Stripe & Stare, can enhance your comfort and shape.

Why Bra Size Matters

A properly fitted bra supports your bust, prevents discomfort, and enhances your silhouette. Wearing the wrong size can lead to back pain, shoulder strain, and skin irritation. It can also affect how your clothes fit.

Many factors influence bra size, including weight changes, pregnancy, and aging. That's why it's important to measure yourself regularly—at least once a year or whenever you notice a change in fit.

Step 1: Measure Your Band Size

Wrap the measuring tape around your ribcage, directly under your bust. The tape should be snug but not tight, and parallel to the floor. Exhale and take the measurement in inches. Round to the nearest whole number. If the number is even, add 4 inches; if odd, add 5. This is your band size.

For example, if your underbust measures 30 inches, your band size is 34. If it measures 31, your band size is 36. This method ensures the band sits comfortably and provides support.

Step 2: Measure Your Bust Size

Wrap the tape around the fullest part of your bust, keeping it parallel to the floor. Make sure the tape is not too tight—it should lie flat without digging into your skin. Record the measurement in inches.

Avoid measuring over a padded bra, as this can add bulk and skew the result. A non-padded bra or a camisole works best for accuracy.

Step 3: Calculate Your Cup Size

Subtract your band size 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, and so on.

For instance, if your band size is 34 and your bust measures 37, the difference is 3 inches, making you a C cup. Use a bra size calculator to double-check your math.

Step 4: Try It On

While measurements are a great starting point, the real test is how the bra feels. When you try on a bra, ensure the band sits level across your back and doesn't ride up. The center gore should lie flat against your sternum, and the straps should stay in place without digging.

Move around—raise your arms, bend, and twist. A well-fitted bra stays put and feels comfortable all day. If the band rides up, go down a band size; if the cups wrinkle or overflow, adjust the cup size accordingly.

Step-by-Step Bra Sizing Checklist

1. Measure Band: Wrap tape under bust, snug and level. Round to nearest inch, add 4 if even, 5 if odd. Checkpoint: Tape should not leave marks.
2. Measure Bust: Wrap tape at fullest part of bust, parallel to floor. Do not compress. Checkpoint: Tape should be flat, not digging.
3. Calculate Cup: Subtract band from bust. 1 inch = A, 2 = B, 3 = C, 4 = D, 5 = DD. Checkpoint: Use a bra size calculator for accuracy.
4. Try On: Check band level, center gore, and strap comfort. Move around to test. Checkpoint: If band rides up, go down a band size.

Bra Styles That Fit Your Measurements

• Smooth Sculpt Padded Bra - Latte: The Smooth Sculpt Padded Bra in Latte is shaping, smoothing, and naturally contouring your curves. Lightly padded cups give just the right lift, creating a modern, sporty silhouette that’s equal parts flattering and comfy. With medium support and cloud-soft comfort. If your measurements indicate medium support needs, this padded bra offers a smooth shape under t-shirts and everyday outfits.
• Lace Plunge Bra - Mosaic Nights: The Lace Plunge Bra in Mosaic Nights has a high-apex design for fuller coverage and cloud-soft, non-padded cups. It offers light to medium support while keeping things effortlessly comfy. Trimmed with signature lace, it lifts, sculpts, and gives a perfect plunge silhouette. For those who prefer a non-padded option, this plunge bra provides a flattering shape and works well with lower necklines.

Measuring your bra size at home is a simple skill that pays off in comfort and confidence. Remember to re-measure regularly, and don't hesitate to try different styles to see what works best for your body. With the right fit, you'll feel supported all day.