Before you start: Measure without a bra on. When you measure over a bra you're measuring the bra, not yourself. Grab a soft measuring tape — the kind used for sewing. Takes less than 5 minutes.
Find Your Real Size
No guessing. No "close enough." Your actual measurements, calculated correctly.
📏Measure
✏️Tweaks
✨Results
Step 1: Get Your Three Measurements
Measure without a bra on. All measurements in inches.
1️⃣ Underbust
Wrap the tape directly under your breasts, around your ribcage. Pull it as snug as you'd want a bra band to feel.
inches
2️⃣ Standing Bust
Stand up straight and measure around the fullest part of your breasts. Don't pull the tape tight — let it sit naturally.
inches
3️⃣ Leaning Bust
Lean forward at the waist so your breasts hang forward, then measure around the fullest point. Don't pull tight.
inches
Step 2: A Few Quick Questions
These help us fine-tune your result. Don't overthink it — go with your gut.
How close together are your breasts when supported?
Your age range:
Are you currently pregnant?
Your Bra Size
—
US Sizing
Your Sister Sizes
Same breast volume, different band tightness. All three will fit — your true size gives the best support.
—
Sister Up
Looser band
—
✨ Your Size
Best fit
—
Sister Down
Snugger band
Your Fit Notes
First time seeing this size? That's completely normal. Many people discover their true size is very different from what they've been wearing. Give it an honest try — read our complete fitting guide to understand what to look for.