To determine a girl's bra size, you need to take two primary measurements: the band size and the bust size. These measurements are then used in combination to find the correct bra fit.
Knowing a girl's bra size involves a simple, two-step measuring process that can be done at home. Precision is key to ensuring comfort and proper support.
Step 1: Measuring Your Band Size
The band size is the number part of a bra size (e.g., 32, 34, 36). It corresponds to the measurement around the rib cage, directly underneath the bust.
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Tools Needed: A soft measuring tape.
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Procedure:
- Ask the girl to wear a lightly lined bra or no bra at all for the most accurate measurement.
- Wrap the measuring tape snugly around her rib cage, directly under her bust, keeping it parallel to the floor.
- Ensure the tape is pulled tight but not uncomfortably so.
- Read the measurement in inches.
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Calculation Insight (from reference): If the measurement is an odd number or includes a half-inch, you should round up to the nearest even whole number. For example, if the measurement is "29 and a half," you would round that up to "30." This rounded number will be your starting band size.
Step 2: Measuring Your Bust Size
The bust size is used to determine the cup letter (e.g., A, B, C). It's the measurement around the fullest part of the bust.
- Procedure:
- Keep the measuring tape parallel to the floor.
- Wrap the tape around the fullest part of the bust (usually across the nipples).
- Ensure the tape is not too tight and does not compress the breast tissue.
- Read this measurement in inches.
Step 3: Determining Your Cup Size
Once you have both the band size and the bust size, you can calculate the cup size. The cup size is determined by the difference between these two measurements.
- Calculation:
- Subtract your calculated band size from your bust size.
- The difference corresponds to a specific cup letter, as shown in the table below:
| Difference (Inches) | Cup Size |
|---|---|
| 0–1 | AA |
| 1 | A |
| 2 | B |
| 3 | C |
| 4 | D |
| 5 | DD (E) |
| 6 | DDD (F) |
| 7 | G |
- Example: If your band size is 34 inches and your bust size is 37 inches, the difference is 3 inches (37 - 34 = 3). According to the table, a 3-inch difference corresponds to a C cup. Therefore, the bra size would be 34C.
Practical Considerations for Bra Sizing
- Comfort is Key: While measurements provide a starting point, the ultimate test of a bra's fit is how comfortable it feels.
- Sister Sizes: If a specific size isn't comfortable, consider "sister sizes." For example, a 34B is a sister size to 32C and 36A, meaning they have a similar cup volume even with different band sizes.
- Brand Variations: Bra sizes can vary slightly between brands, so always try on bras before purchasing.
- Professional Fitting: Many lingerie stores offer free professional bra fittings, which can be invaluable for finding the perfect fit.
