US: 24 to United Kingdom Size 20-22
Cross-market women’s sleepwear conversion mapping 24 specifications into 20-22 for nightgowns, pajama sets, and sleep shirts.

Analyzing Women’s Sleepwear Equivalence Across Markets
US: 24: Corresponds to a relaxed bust range of 121–125 (47.6–49.2 ), elastic waist range of 103–108 (40.6–42.5 ), and comfort drape classification Loose Lounge Fit.
United Kingdom Size 20-22: Corresponds to a relaxed bust range of 105–109 (41.3–42.9 ), elastic waist range of 87–92 (34.3–36.2 ), and comfort drape classification Loose Lounge Fit.