SizeSystemMetric Metric size system. Properties { "id": "https://schema.org/SizeSystemMetric", "label": "SizeSystemMetric", "comment": "Metric size system.", "subTypeOf": "https://schema.org/SizeSystemEnumeration", "enumerationtype": "https://schema.org/SizeSystemEnumeration", "equivalentClass": "", "properties": "", "subTypes": "", "supersedes": "", "supersededBy": "", "isPartOf": "https://pending.schema.org" }Getting Started