Wacoal vs Soma
Two brands, two ways of grading a size. Here is how Wacoal and Soma differ in system, range and fit, and which one to choose for your shape and your problem.
Wacoal or Soma, in short
Wacoal and Soma both label in US sizing. Wacoal runs true to size in the band and true in the cup with average wires; Soma runs true to size in the band, true in the cup, average wires. Range: Wacoal 30–46 / A–H; Soma 32–44 / A–H. Convert your measured size into each and let fit decide.
Your measured size in both
Same body, two labels. Each result is your US size converted into the brand's system, then adjusted for how that brand grades. Same system, so the label matches: the fit adjustment is the difference.
Wacoal vs Soma at a glance
| Wacoal | Soma | |
|---|---|---|
| Sizing system | United States | United States |
| Bands | 30–46 | 32–44 |
| Cups | A–H (some styles to I) | A–H (some styles to I) |
| Band grading | true to size | true to size |
| Cup grading | true | true |
| Wire width | average | average |
| Straps | Standard; sport line uses wide, cushioned straps | Standard; wide on Stunning Support |
| Alpha sizes | No | No |
| Tier | Premium | Mid-market |
| Origin | Japan / US | US |
| Signature line | Awareness: the flagship full-figure underwire and wireless line, cups to H | Vanishing 360: smoothing back and t-shirt bras |
Which to try for your breast shape
| Shape | Wacoal | Soma |
|---|---|---|
| Full on bottom | Basic Beauty contour, Halo Lace | Vanishing 360 demi |
| Full on top | Awareness full cup | Stunning Support |
| Shallow | Basic Beauty, wireless Awareness | Enbliss wireless |
| Projected | Halo Lace, seamed Awareness | Embraceable |
| Wide-set | Retro Chic full-figure | Vanishing 360 plunge |
Not sure of your shape? Use the shape finder.
Choose Wacoal or Soma?
- a first accurate size: the label matches the measurement
- contour t-shirt bras that don't gape or spill
- in-person fitting at mall prices
- wireless comfort in bra sizes
Both are right at the same measurement. The label differs by system and the fit by grading: start from your measured size, convert into each, and let the five fit checks decide.
What each brand is known for
| Wacoal | Soma | |
|---|---|---|
| Line 1 | Awareness: the flagship full-figure underwire and wireless line, cups to H | Vanishing 360: smoothing back and t-shirt bras |
| Line 2 | Basic Beauty: contour t-shirt bra, one of the most consistent molded fits in US sizing | Enbliss: wireless comfort |
| Line 3 | Halo Lace: seamless lace underwire in a broad range | Stunning Support: full-figure underwire to H/I |
| Line 4 | Sport: high-impact underwire sport bras graded in bra sizes, not S/M/L | Embraceable: lace and everyday |
Wacoal vs Soma: answered
Is Wacoal the same size as Soma?
Same notation (US), different grading. Wacoal: Bands run true to size: start with your measured band on the loosest hook. Soma: Bands run true to size: start with your measured band on the loosest hook.
Which runs smaller, Wacoal or Soma?
Wacoal. Cups grade true to the measured difference. Soma. Cups grade true to the measured difference.
Which is better for a large bust, Wacoal or Soma?
Wacoal runs to A–H on bands 30–46; Soma to A–H on 32–44. The one whose range covers your size (in its own system) and whose wire width suits your root.
Which is better for a small bust?
Whichever grades true or small at A–C: Wacoal cups true, Soma cups true. Small bands need the brand whose range starts lower: 30 vs 32.
Can I use my Wacoal size at Soma?
Convert first (same system, so the label carries), then adjust: Soma bands run true to size and cups true relative to true. The calculator above does both.
Do Wacoal and Soma fit the same breast shapes?
Not identically. Full on bottom: Wacoal Basic Beauty contour, Halo Lace vs Soma Vanishing 360 demi; Full on top: Wacoal Awareness full cup vs Soma Stunning Support; Shallow: Wacoal Basic Beauty, wireless Awareness vs Soma Enbliss wireless.
Opens HauteFlair’s own hub page; use your measured size there. HauteFlair is owned by the same company as Brasize.ai; that relationship never changes the sizing math, charts, or fit advice on this page. How this site makes money.