Underoutfit — Fit Guide
Find Your Perfect
Bra Size
Three measurements. Thirty seconds. A size that actually fits — and a bra designed around it.
Step 1 of 3
Measure Your Underbust
Wrap a soft measuring tape around your ribcage, directly below your breasts. Take three readings — loose, snug, and tight — on a deep exhale. All measurements should be taken on bare skin.
Tape sits loosely — no digging in
Tape snug — as tight as a well-fitting bra band
Tape as tight as possible without discomfort
How to measure your underbust
Loose
The tape should not dig in at all. Let it rest naturally around your ribcage.
Snug
Dig the tape in a little — as snug as you'd want a bra band to feel during wear.
Tight
Pull the tape as tight as possible without causing pain or discomfort.
Measure on bare skin, on a deep exhale. Keep tape parallel to the floor.
Step 2 of 3
Measure Your Bust
Wrap the tape loosely around the fullest part of your bust. Take three readings in different postures — standing, leaning forward at 90°, and lying flat on your back.
Stand straight, tape loosely around fullest part
Bend forward 90°, tape loosely around fullest part
Lie on your back, tape loosely around fullest part
How to measure your bust
Standing
Stand straight and measure loosely around the fullest part of your bust.
Leaning
Bend forward at 90° and measure loosely around the fullest part.
Lying Down
Lie on your back and measure loosely around the fullest part of your bust.
Keep the tape parallel to the floor and loose enough to slip two fingers underneath.
Step 3 of 3
Your Preferences
Choose your preferred sizing system and units. These settings affect how your result is displayed — the underlying fit calculation remains the same.
Sizing System
Units Used for Measurements
Your Recommended Size
Fit Tips for Your Size
Shop Your Size
Explore Underoutfit bras designed for your exact measurements — wire-free, all-day comfort.
Shop Now →