Theory Women's Size Guide
Theory Women's Size Guide
Fit Summary
Theory is a US contemporary minimalist brand using US sizing as base standard for women’s tops. Women’s styles include tailored crepe blouses, refined knit sweaters, structured poplin shirts, sleek jersey tees and polished everyday layering pieces, available in Fitted, Regular and Relaxed silhouettes. Regular-fit pieces generally run true to US sizing; tailored styles feature clean semi-slim cuts, while relaxed silhouettes offer gentle drape without excessive volume. Crepe, linen and non-stretch woven fabrics have minimal give; ponte and blend knit styles carry mild elasticity. Shoppers selecting non-stretch structured woven styles are recommended to size up for extra comfort.
Similar sizing reference: US contemporary minimalist womenswear sizing; tailored semi-slim fit, more refined and structured than casual streetwear brands.
Note: UK / EU / AU / CN‑Size marked "≈" are approximate conversions for reference only. This guide covers women’s tops only; bottoms, dresses and outerwear are not included. Actual garment fit depends on fabric and silhouette.
| Intl | US | UK ≈ | EU ≈ | AU ≈ | CN国标号型 ≈ | Bust(cm) | Bust(in) |
|---|---|---|---|---|---|---|---|
| XS | 0-2 | 4 | 34 | 6 | 155/80A | 79 | 31.1 |
| S | 4-6 | 6-8 | 36 | 8 | 160/84A | 84 | 33.1 |
| M | 8-10 | 10 | 38 | 10 | 165/88A | 89 | 35.0 |
| L | 12-14 | 12-14 | 40 | 12 | 170/92A | 95 | 37.4 |
| XL | 16 | 16 | 42 | 14 | 175/96A | 102 | 40.2 |
Last updated: Q3 2026 · Reviewed quarterly by SizeHub editor | Source: Theory official size guide reference
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