How to Measure Yourself for a Bra: A Step-by-Step Guide

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 size at the fullest part of your chest. Subtract the band measurement from the bust measurement to find your cup size.

Finding the right bra size can feel like a mystery, but it doesn't have to be. Many women wear the wrong size without knowing it, leading to discomfort and lack of support. The good news is that you can measure yourself at home in just a few minutes with a soft tape measure.

Whether you're shopping for a new everyday bra or a special piece like a sheer thong from Bluebella, knowing your correct size ensures you get the fit and confidence you deserve. This guide will walk you through each step, highlight common mistakes, and help you decode the numbers.

Why Bra Size Matters

Wearing the correct bra size isn't just about comfort—it affects how your clothes fit, your posture, and even your confidence. A bra that's too tight can cause irritation and back pain, while one that's too loose offers little support. Measuring yourself regularly is key, as your size can change due to weight fluctuations, hormonal shifts, or aging.

When you know your measurements, you can shop with confidence, whether you're browsing online or in-store. For example, if you're eyeing a delicate embroidered bra like the Marian Embroidered Bra, you'll want to ensure the band and cups sit perfectly to showcase the design.

• Measure yourself every six months or after significant weight changes.
• Use a soft, flexible tape measure for accurate results.

What You'll Need

Before you start, gather a few essentials: a soft measuring tape, a mirror, and a well-fitting, non-padded bra (or go braless for the most accurate bust measurement). Wear minimal clothing to avoid extra bulk.

If you don't have a measuring tape, you can use a piece of string and a ruler, but a fabric tape is easier and more precise. Having a friend help can also improve accuracy, especially for the bust measurement.

• Wear a non-padded bra or no bra for the bust measurement.
• Stand straight with your arms relaxed at your sides.

Step-by-Step Measuring Process

The process involves two key measurements: band and bust. First, measure your band size by wrapping the tape around your ribcage, directly under your bust. Ensure the tape is level and snug but not tight. Round to the nearest whole number. If it's an even number, add 4 inches; if odd, add 5. This gives your band size in inches.

Next, measure your bust size at the fullest part of your chest, keeping the tape parallel to the floor. Don't pull too tight—allow for a little give. Round to the nearest whole number. Finally, subtract your band size from your bust measurement. The difference determines your cup size: 1 inch = A, 2 = B, 3 = C, 4 = D, and so on.

• Keep the tape level and snug but not digging into your skin.
• Don't hold your breath or puff out your chest—stand naturally.

Common Measuring Mistakes

One of the most common mistakes is measuring over a padded bra, which adds bulk and skews results. Another is pulling the tape too tight or too loose, leading to inaccurate numbers. Also, many people forget to round properly, which can throw off the entire calculation.

Another pitfall is ignoring the sister size. If your band feels tight but cups are perfect, try a sister size: go up a band and down a cup, or vice versa. For example, if you measure as a 34C but find the band snug, a 36B might offer a better fit.

• Always measure on bare skin or thin clothing.
• Double-check your measurements by measuring twice.

Using a Bra Size Calculator

If math isn't your thing, online bra size calculators can do the work for you. Simply input your band and bust measurements, and the calculator will suggest your size. However, remember that calculators are a starting point—different brands and styles may fit differently.

For instance, a plunge bra like the Marian Embroidered Bra might fit differently than a strappy style like the Trinity Sheer Strappy Bra. Always check the brand's size guide and consider customer reviews for fit insights.

• Use a calculator as a guide, not the final word.
• When in doubt, order two sizes and return the one that doesn't fit.

Your Step-by-Step Measuring Checklist

1. Measure your band: Wrap the tape around your ribcage, just under your bust. Keep it level and snug. Round to the nearest whole number. If even, add 4 inches; if odd, add 5. Checkpoint: The tape should be snug but not leave marks.
2. Measure your bust: Wrap the tape around the fullest part of your chest, keeping it parallel to the floor. Don't pull tight; allow for a little give. Round to the nearest whole number. Checkpoint: Ensure the tape isn't dipping or riding up at the back.
3. Calculate your cup size: Subtract your band size from your bust measurement. The difference corresponds to a cup letter: 1" = A, 2" = B, 3" = C, 4" = D, and so on. Checkpoint: If the difference is between sizes, round up to the nearest letter for comfort.
4. Try it on and adjust: Use your calculated size as a starting point. Try on bras in that size and sister sizes to see which fits best. Check the band fits snugly on the loosest hook, and the cups contain all breast tissue without spillage or gaps. Checkpoint: The center gore should lie flat against your sternum.

Products That Fit Well When You Know Your Size

• Marian Embroidered Bra Black: Fun and flirty, the Marian Embroidered Bra in black boasts lip-shaped embroidery to cover you in kisses as you wear it. This sleek plunge bra is topped with gold-tone hardware for a glamorous finish and can be styled with the matching Marian pieces, like the thong, panty or suspender. Knowing your correct size ensures the plunge silhouette sits right and provides the intended support and style.
• Trinity Sheer Strappy Bra Black: Looking for the epitome of confidence and style? Look no further than the Trinity Sheer Strappy Bra in black. This exquisite piece of strappy lingerie is designed to make a statement that demands attention. One of the standout features of the Trinity bra is its wide directional straps over sheer material. These straps not only provide a unique and eye-catching design element but also offer exceptional support and... Accurate band and cup measurements help the directional straps align properly for both support and visual impact.

Measuring yourself for a bra is a simple skill that pays off in comfort and confidence. Remember to re-measure periodically, and don't hesitate to try different styles and brands. With your correct size in hand, you can shop Bluebella's beautiful lingerie collection with assurance that every piece will fit beautifully.