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Re:GlobalFoundries Details 7 nm Plans: Three Generations, 70... by reportingsjr on Friday June 23, 2017 @05:52PM (#14623068)
Fab lines are indicated by wafer size rather than feature size. Although it is normally in inches starting at 4" and smaller.
Re:GlobalFoundries Details 7 nm Plans: Three Generations, 70... by btian on Friday June 23, 2017 @07:35PM (#14623548)
It hasn't been in inches for years.

The most common size is 300 mm, next generation will be 450 mm.