core + meta (Meta Extension): terms used within schema.org for schema definitions.

servingSize

Canonical URL: http://schema.org/servingSize

Thing > Property > servingSize

The serving size, in terms of the number of volume or mass.

Usage: Between 1000 and 10,000 domains
Values expected to be one of these types
Text
Used on these types
NutritionInformation

Schema Version 3.3