How to Measure Bra Size

Measuring your bra size is important for ensuring comfort and proper support. Here are the steps to measure your bra size:

Materials Needed:

  • Soft measuring tape
  • Mirror (optional)
  • Comfortable, non-padded bra

Step 1: Wear a Well-Fitting, Non-Padded Bra:

  • Make sure you’re wearing a bra that fits well and doesn’t have extra padding. This will give you a more accurate measurement.

Step 2: Measure Your Band Size:

  1. Underbust Measurement:
    • Stand in front of a mirror if possible. Hold the measuring tape snugly around your ribcage, right under your bust. Make sure it’s parallel to the ground and doesn’t sag at the back.
  2. Take the Measurement:
    • Exhale gently and take the measurement in inches. Round to the nearest whole number. If it’s an even number, add 4 inches; if it’s an odd number, add 5 inches.
    • For example, if your underbust measurement is 31 inches, adding 5 inches gives you a band size of 36.

Step 3: Measure Your Bust Size:

  1. Fullest Part of Your Bust:
    • Measure around the fullest part of your bust while keeping the tape comfortably snug, but not tight.
  2. Take the Measurement:
    • Make sure the measuring tape is parallel to the ground. Round to the nearest whole number.
    • For example, if your bust measurement is 38 inches, there’s a 2-inch difference from your band size, indicating a cup size of B.

Step 4: Determine Cup Size:

  • Subtract your band size from your bust measurement. The difference determines your cup size:
    • 1 inch: A cup
    • 2 inches: B cup
    • 3 inches: C cup
    • 4 inches: D cup
    • 5 inches: DD/E cup
    • 6 inches: DDD/F cup
    • 7 inches: DDDD/G cup


  • Using the measurements from above (36 band, 38 bust), the difference is 2 inches, indicating a B cup. So, your bra size would be 36B.

Final Tips:

  • Remember that bra sizes can vary between different brands and styles, so it’s a good idea to try on bras in the size you measured to ensure the best fit.
  • If possible, get professionally fitted at a lingerie store. They have experience and expertise in finding the right fit.
  • Re-measure regularly, as factors like weight loss or gain can affect your bra size.

By following these steps, you should be able to find a bra that provides both comfort and support.

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