Analysis
NAICS 31525 is the 2022 NAICS industry for cut and sew apparel manufacturing (except contractors), part of 3152 (Cut and Sew Apparel Manufacturing).
It has only one more detailed code, 315250, which covers exactly the same activities; the definition, index entries and statistics are on that page.
County Business Patterns publishes no national count for it, either because the code is out of the survey's scope or because the figures are suppressed to protect individual businesses.
Official definition
See industry description for 315250.
Source: US Census Bureau, NAICS 2022 Manual.