Source: Schema.org v30.1 vocabulary. Official numItems property definition.
What does numItems mean?
Limits the number of items being shipped for which these conditions apply.
Used on types (domainIncludes)
Expected value types (rangeIncludes)
Schema.org domainIncludes and rangeIncludes are descriptive guidance, not strict validation prohibitions. Check the official reference for updates.
Related reference
Browse all Schema.org types and properties · Google feature support status