How to Measure Your Bra Size
Follow our professional step-by-step guide to get accurate measurements at home.
What You'll Need
-
Soft measuring tape (fabric, not metal)
-
Well-fitting, non-padded bra
-
Mirror (optional but helpful)
-
Someone to help (recommended)
Pro Tip
Measure yourself in the morning when your body is at its most consistent size.
1
Measure Your Band Size (Underbust)
Instructions:
- • Wear a well-fitting, non-padded bra
- • Wrap the measuring tape around your ribcage, just under your breasts
- • Keep the tape parallel to the floor
- • The tape should be snug but not tight
- • Take the measurement on an exhale
- • Round to the nearest whole number
Important Notes:
- • If the number is even, that's your band size
- • If the number is odd, add 1 to get your band size
- • Example: 31 inches = 32 band size
2
Measure Your Bust Size
Instructions:
- • Keep wearing the same bra
- • Wrap the tape around the fullest part of your bust
- • Keep the tape parallel to the floor
- • Don't pull the tape too tight
- • The tape should lie flat against your back
- • Round to the nearest whole number
Pro Tips:
- • Lean forward slightly when measuring
- • Make sure the tape doesn't slip down your back
- • Take the measurement while standing straight
3
Calculate Your Cup Size
Formula:
Bust Measurement - Band Measurement = Cup Size
1 inch
= A Cup
2 inches
= B Cup
3 inches
= C Cup
4 inches
= D Cup
Common Measurement Mistakes
❌ Don't Do This:
- • Measuring over thick clothing
- • Pulling the tape too tight
- • Measuring without a bra
- • Holding your breath while measuring
✅ Do This Instead:
- • Wear a well-fitting, unpadded bra
- • Keep the tape snug but comfortable
- • Ask someone to help you measure
- • Breathe normally during measurement
Ready to Calculate Your Size?
Use our professional calculator with your measurements
Calculate My Size