US: 3XL (24–26) to United Kingdom Size 16–18
Cross-market women’s blouse, t-shirt, and sweater conversion mapping 3XL (24–26) specifications into 16–18.

Analyzing Women’s Upper-Body Size Equivalence Across Markets
US: 3XL (24–26): Bust interval range of 120.7–127 (47.5–50 ), natural waist range of 99.1–106.7 (39–42 ), shoulder width of 47 (18.5 ), sleeve length of 83.8 (33 ), style variants Curve Plus Tops, Tunics & Oversized Knitwear, and fit classification Curve Plus Fit.
United Kingdom Size 16–18: Bust interval range of 97.8–104.1 (38.5–41 ), natural waist range of 76.2–82.6 (30–32.5 ), shoulder width of 41.3 (16.25 ), sleeve length of 80 (31.5 ), style variants Blouses, T-Shirts, Tank Tops, Sweaters & Cardigans, and fit classification Relaxed Comfort Fit.
Other Conversions to United Kingdom Size 16–18
US: XS (0–2) → uk-16-18XS (0–2) to uk-16-18
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US: S (4–6) → uk-16-18S (4–6) to uk-16-18
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US: M (8–10) → uk-16-18M (8–10) to uk-16-18
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US: L (12–14) → uk-16-18L (12–14) to uk-16-18
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US: XL (16–18) → uk-16-18XL (16–18) to uk-16-18
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US: 2XL (20–22) → uk-16-182XL (20–22) to uk-16-18
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US: 3XL (24–26) → uk-16-183XL (24–26) to uk-16-18
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