US: Size 5 to Europe Size 4
Cross-market children’s diapers, nappies, and training pants apparel conversion mapping Size 5 specifications into 4.

Analyzing Size Equivalence Across Markets
US: Size 5: Corresponds to a weight range of 12.2–20 (27–45 ) and an approximate age bracket of 18–36 .
Europe Size 4: Corresponds to a weight range of 7.3–12.7 (16–28 ) and an approximate age bracket of 6–12 .