Official chart
Official Wacoal size chartBrand sizing guide
Wacoal Bra Size Guide
Wacoal sizing is built around measurement precision and fit checks. Use this guide to compare your Wearavo starting size with Wacoal's fit calculator, 5 Points of Fit, bralette chart, and style guidance.
Last updated August 18, 2026. Data checked against Wacoal fit calculator, size charts, and fit-guide pages.
Quick answer
How Wacoal bra sizing works
Wacoal's calculator asks you to wear a non-padded bra, measure the underbust with the tape aligned to the bra band, then measure the fullest part of the bust without flattening it. Treat the result as a starting size and confirm it with Wacoal's fit checks.
Measure band
Snug underbust measurement, level around your body.
Measure bust
Fullest-bust measurement over a non-padded bra.
Check fit
Use band, strap, cup, shape, and lift checks.
Fit guide
Wacoal's 5 Points of Fit
Wacoal's 5 Points of Fit guide checks the band, straps, cups, shape, and lift. The brand notes that the band provides most of the support, so a level, secure band matters more than overtightened straps.
Band
The band should stay put when you raise your arms; if it rides up, Wacoal suggests a smaller band.
Straps
Wacoal says you should be able to slide two fingers under the strap after adjustment.
Cups
Spillage means a larger cup may help; gapping means a smaller cup may fit better.
Shape
The sides of the breasts should stay within your body frame, with side support when needed.
Lift
From the side, the fullest point should sit roughly between shoulder and elbow.
Bralettes
Wacoal bralette size chart notes
Wacoal's size chart lists average-capacity and full-capacity bralette ranges. Use this table only for Wacoal bralettes that follow the general Wacoal bralette chart.
| Alpha size | Average capacity | Full capacity |
|---|---|---|
| XS | 30 A/B | 30 D/DD |
| S | 32 B | 32 D/DD |
| M | 34 B/C | 34 D/DD |
| L | 36 B/C | 36 D/DD |
| XL | 38 C | 38 D/DD |
| XXL | 40 C | 40 D/DD |
| XXXL | 42 C | 42 D/DD |
| 4XL | 44 D | 44 D/DD |
Styles
Wacoal bra styles by need
T-shirt bras
Light padding for opacity, shaping, and a smooth look under clothes.
Underwire bras
Designed to separate and contain the bust for a more defined shape.
Unlined bras
No foam cups, so they work more closely with your natural shape.
Wire-free bras
More support than a bralette without using underwire.
Compare
Use your Wearavo result inside Wacoal
Start with your Wearavo band and cup result. If a Wacoal style uses alpha sizing, compare the bralette chart instead of guessing from your usual band/cup size.
Shop carefully
Shop Wacoal after checking fit and style
Wacoal offers structured, full-figure, strapless, minimizer, unlined, and wire-free styles. Confirm the exact style's size options and return policy before buying. Affiliate links may earn a commission at no extra cost to you.
FAQ
Does Wacoal have a bra size calculator?
Yes. Wacoal has a bra fit calculator that asks for underbust and overbust measurements in inches or centimeters. Wear a non-padded bra and keep the tape level for the best starting point.
What are Wacoal's 5 Points of Fit?
Wacoal's fit guide checks band, straps, cups, shape, and lift. These checks help confirm whether the calculated size actually works on your body.
Does Wacoal use US or UK cup sizes?
Wacoal America uses US sizing for Wacoal bras. Its size chart also lists US-to-UK cup conversions for Elomi, Freya, and Fantasie.
How do Wacoal bralette sizes work?
Wacoal bralettes use alpha sizes such as XS through 4XL, with separate average-capacity and full-capacity bra-size ranges. Check the exact Wacoal chart before choosing an alpha size.
Does Wacoal run true to size?
Fit varies by style, coverage, wire, fabric, and breast shape. Use Wacoal's calculator and 5 Points of Fit, then check the product's available sizes and return policy.
Should I use Wearavo before shopping Wacoal?
Yes. Use Wearavo for a starting size, then compare it with Wacoal's fit calculator, size charts, and style guidance before buying.
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