Wacoal Bra Size Calculator
Find your perfect Wacoal bra fit using official measurement methods. Get accurate band size, cup size, and sister size recommendations based on Wacoal's sizing standards.
About Wacoal
Wacoal is a Japanese intimate apparel company founded in 1949, known for precision-engineered bras with exceptional fit and quality. Their sizing follows US standards with true-to-size fitting across band sizes 30-44 and cup sizes A-I+.
Enter Your Measurements
Measure snugly around ribcage, directly under your bust
Measure around fullest part of bust, tape parallel to floor
Your Wacoal Size
Band Size Formula:
Cup Size Formula:
Cup Progression:
Sister Size Formulas:
How to Measure for Wacoal Bras
Wear an Unpadded Bra
For best results, wear your best-fitting unpadded bra or measure without one. Stand straight with arms at your sides.
Measure Your Underbust
Wrap a soft measuring tape snugly around your ribcage, directly under your bust where a bra band would sit. Keep tape level all around.
Measure Your Full Bust
Measure around the fullest part of your bust (usually at nipple level). Keep tape parallel to floor without pulling too tight or too loose.
Calculate Your Size
Enter both measurements into the calculator. Your band size is your underbust rounded to the nearest even number. Cup size is determined by the difference.
Wacoal Bra Size Chart
| Underbust (in) | Band Size | Difference | Cup Size |
|---|---|---|---|
| 28-29 | 30 | 1" | A |
| 30-31 | 32 | 2" | B |
| 32-33 | 34 | 3" | C |
| 34-35 | 36 | 4" | D |
| 36-37 | 38 | 5" | DD |
| 38-39 | 40 | 6" | DDD/F |
| 40-41 | 42 | 7" | G |
| 42-43 | 44 | 8" | H |
| 44-45 | 46 | 9" | I |
Wacoal Bra Collections
Basic Beauty
Seamless, invisible under clothing. Smooth cups and contour fit for everyday wear. Available in band 32-42, cups B-DDD.
Embrace Lace
Feminine lace with unlined cups. Supportive with romantic styling. Popular full-figure option in extended sizes.
Visual Effects
Minimizer bra that reduces projection while providing full support. Ideal for fitted clothing.
Sport by Wacoal
High-impact support with moisture-wicking fabric. Encapsulated cups for natural shape during activity.
Wacoal Fitting Tips
- Wacoal runs true to size - trust your calculated measurements
- The band provides 80% of support; ensure it's snug but comfortable
- Full coverage styles may run slightly more generous in cups
- Sports bras may require sizing up in band for comfort during activity
- Check style-specific reviews as fit can vary between collections
- Wacoal offers specialized fits for shallow, projected, and full-on-bottom shapes
Frequently Asked Questions
Wacoal uses standard US sizing and is known for true-to-size fitting. Unlike some brands that run small or large, Wacoal bras typically fit accurately to your calculated measurements. If you wear 34C in properly fitted bras, you'll likely wear 34C in Wacoal.
Wacoal offers band sizes from 30 to 44 (some styles to 46) and cup sizes from A to I (some styles to K). Their extended size range caters to diverse body types, making quality bras accessible to more women.
A proper fit means: the band sits level without riding up (you can fit two fingers underneath), cups contain all breast tissue without gaps or spillage, the center gore lies flat against your sternum, and straps stay in place without digging in.
Some variation exists. Full coverage styles may provide more room in the cup, plunge bras may fit slightly smaller, and sports bras are often sized for compression. Check style-specific reviews and consider sister sizes for different styles.
Wacoal is a Japanese brand (founded 1949) known for precision engineering, premium materials, and exceptional fit research. They use advanced body mapping technology and offer specialized fits for different breast shapes.
Related Calculators
Official Wacoal Resources
Created by OmniCalculator.space | Last Updated: January 2026