How to Know Your Bust Size: A Professional Guide

How to Know Your Bust Size: A Professional Guide to Getting the Perfect Fit

Finding your correct bust size is the foundation of well-fitting bras, confident posture, and all-day comfort. Yet, many women are wearing the wrong bra size simply because they’ve never had an accurate measurement. At Olivia Paisley Intimates, we believe that a great fit starts with knowledge—so here’s your expert guide on how to measure your bust size like a pro.

Why Knowing Your Bust Size Matters

An ill-fitting bra can cause a range of issues: from gaping cups and slipping straps to back pain and poor support. Knowing your true bust size helps you:

• Choose bras that offer proper support

• Enhance your natural silhouette

• Feel more comfortable and confident

• Extend the life of your lingerie

Understanding how to correctly measure your bust—and how it translates into bra sizes—is essential.

Step-by-Step: How to Measure Your Bust Size at Home

All you need is a soft measuring tape, a mirror, and preferably a non-padded bra or no bra at all. Let’s break it down:

Step 1: Measure Your Band Size (Underbust)

• Stand straight, wrap the measuring tape snugly around your ribcage, just under your bust.

• Make sure it’s level all the way around.

• Round to the nearest whole number.

• If the number is even, add 4. If it’s odd, add 5.

For example: 31" underbust + 5 = 36 band size

Step 2: Measure Your Bust (Overbust)

• Wrap the tape loosely around the fullest part of your bust—usually over the nipples.

• Make sure the tape is parallel to the ground and not compressing the tissue.

• Round to the nearest whole number.

For example: 39" overbust

Step 3: Calculate Your Cup Size

• Subtract your band size from your bust measurement.

39" - 36" = 3" difference

• Use the difference to find your cup size:

  • 1" = A

  • 2" = B

  • 3" = C

  • 4" = D

  • 5" = DD/E

  • 6" = DDD/F, and so on.

Final Bra Size: 36C

Pro Tips for Accurate Measuring

• Measure without bulky clothing, preferably against bare skin.

• Take measurements in front of a mirror to ensure the tape stays level.

• Re-measure every 6–12 months, as weight, hormones, and age can change your size.

• Use your measurements as a starting point—every brand fits slightly differently.

Prefer a Professional Fitting?

We always recommend getting fitted by a specialist for the most accurate size and style recommendations.

At Olivia Paisley Intimates, we offer:

• Private, in-store fittings by trained bra fitters

• Personalized suggestions based on your bust shape, lifestyle, and preferences

• A curated collection of bras for every size and support need

Because the right bra isn’t just about size—it’s about how it makes you feel.

Final Thoughts

Knowing your bust size empowers you to shop smarter and feel better. Whether you’re exploring wireless comfort, full-coverage styles, or bralettes for big busts, it all starts with getting your fit right.

Visit Olivia Paisley Intimates in Woodland Hills or browse our online fit tools to find bras that lift, support, and celebrate your shape—beautifully.