US: Size 6 to Europe Size 3
Cross-market children’s diapers, nappies, and training pants apparel conversion mapping Size 6 specifications into 3.

Analyzing Size Equivalence Across Markets
US: Size 6: Corresponds to a weight range of 15.9–25 (35–55 ) and an approximate age bracket of 24–48 .
Europe Size 3: Corresponds to a weight range of 5.4–8.2 (12–18 ) and an approximate age bracket of 2–6 .