How to Measure Your Bra Size at Home: A Step-by-Step Guide
By Evelyn & Bobbie | Published: 2026-09-07
Category: How-to Guides
Learn to measure your bra size accurately at home with our step-by-step guide. Get the right fit for comfort and support.
Quick Answer
To measure your bra size at home, you'll need a soft measuring tape. 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 for confirmation.
Finding a bra that fits well can feel like a challenge, but it doesn't have to be. Many women wear the wrong size without knowing it, which can lead to discomfort, poor support, and even pain. 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, from measuring your band and bust to interpreting the numbers. We'll also point out common mistakes to avoid, so you can shop with confidence—whether you're buying your first wireless bra or adding a new style to your drawer.
Why Accurate Measurement Matters
Wearing the wrong bra size isn't just uncomfortable—it can cause shoulder grooving, back pain, and skin irritation. A well-fitted bra should feel supportive without digging into your skin. Accurate measurement ensures you get the right band and cup size, which is the foundation of both comfort and support.
Your bra size can change over time due to weight fluctuations, hormonal changes, or aging. That's why it's a good idea to measure yourself every six months or whenever a bra starts to feel off. A simple measurement can save you from buying bras that don't work for your body.
- Measure while wearing a non-padded bra or no bra for the most accurate results.
- Use a soft, flexible measuring tape—not a metal one.
What You'll Need
Before you start, gather a soft measuring tape, a mirror, and a piece of paper to note your measurements. If you don't have a fabric tape, you can use a piece of string and a ruler, but a soft tape is easiest.
Wear a non-padded bra or go braless to ensure your natural breast shape isn't altered. Stand straight with your arms relaxed at your sides, and make sure the tape is level all the way around your body.
Step-by-Step Bra Measurement
- Measure Your Band Size: Wrap the measuring tape around your ribcage, directly under your bust. Keep it snug but not tight, and make sure it's level. Round to the nearest whole number. If the number is even, add 4 inches; if odd, add 5. This is your band size. Common mistake: measuring too loosely or too tightly. The tape should be snug enough to stay in place but not leave marks.
- Measure Your Bust Size: Wrap the tape around the fullest part of your bust, keeping it level across your back. Don't pull too tight; allow the tape to sit naturally. Round to the nearest whole number. Checkpoint: Make sure the tape isn't dipping in the back or squeezing your breasts. Stand straight and breathe normally.
- Calculate Your Cup Size: 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, and so on. Common mistake: using the band size you calculated before adding inches. Always use the adjusted band size for the cup calculation.
- Confirm with a Bra Size Calculator: Input your measurements into an online bra size calculator to double-check your result. Many calculators also consider sister sizes, which can help you find alternatives that fit differently. Checkpoint: If the calculator gives a different size than your manual calculation, remeasure to ensure accuracy.
- Try It On: Once you have your size, try on bras to see how they feel. The band should sit horizontally across your back, and the center gore should lie flat against your chest. Adjust straps so they're snug but not digging in. Remember: A bra that fits well should be comfortable from the moment you put it on—no breaking in required.
Bras That Fit Well
- Defy Bra: Named one of NYT Wirecutter’s 2026 best supportive wireless bras. Our original wirefree icon. With full coverage and a smoothing silhouette, The Defy delivers natural lift and all-day comfort without wires. Once you know your size, a wirefree bra like The Defy offers comfortable support that adapts to your body, making it an excellent choice for everyday wear.
- Evelyn Bra - Deep Tide (Final Sale): Timeless elegance, reimagined wirefree. The Evelyn pairs a scalloped V-neckline with our ultra-lift bodice for a naturally defined shape. If you prefer a more defined silhouette, the Evelyn's ultra-lift bodice provides shaping without wires, ideal for those who want both style and function.
Measuring your bra size at home is a simple skill that pays off in comfort and confidence. With these steps, you'll be able to find bras that support you properly, whether you're shopping for a wirefree style or a new everyday favorite. Remember to remeasure periodically, as your body changes.
