United Kingdom Size 16-18 to US: 4-6
Cross-market women’s sleepwear conversion mapping 16-18 specifications into 4-6 for nightgowns, pajama sets, and sleep shirts.

Analyzing Women’s Sleepwear Equivalence Across Markets
United Kingdom Size 16-18: Corresponds to a relaxed bust range of 97–101 (38.2–39.8 ), elastic waist range of 79–84 (31.1–33.1 ), and comfort drape classification Relaxed / Comfort Drape.
US: 4-6: Corresponds to a relaxed bust range of 84–88 (33.1–34.6 ), elastic waist range of 66–70 (26–27.6 ), and comfort drape classification Relaxed / Comfort Drape.
Other Conversions to US: 4-6
United Kingdom Size 4-6 → us-4-64-6 to us-4-6
View
United Kingdom Size 8-10 → us-4-68-10 to us-4-6
View
United Kingdom Size 12-14 → us-4-612-14 to us-4-6
View
United Kingdom Size 16-18 → us-4-616-18 to us-4-6
View
United Kingdom Size 20-22 → us-4-620-22 to us-4-6
View
United Kingdom Size 24-26 → us-4-624-26 to us-4-6
View
United Kingdom Size 28 → us-4-628 to us-4-6
View