Assertion: ply | /r/HasProperty | worsted weight
Facets:
Source sentences:
text: The number of wraps will act as a gauge to assess the thickness of unmarked yarn; for example 12 wraps per inch is 12 WPI, and is used to calculate how much yarn is required for various articles, so that 12 WPI is equivalent to 8 ply (worsted weight, medium weight) yarn.