2022 NAICS national industry in sector 31-33 Manufacturing
339950 Sign Manufacturing
NAICS 339950 is the US industry code for sign manufacturing. It covers establishments primarily engaged in manufacturing signs and related displays of all materials (except printing paper and paperboard signs, notices, displays).
- Code
- 339950 (2022 NAICS)
- Title
- Sign Manufacturing
- Part of
- Other Miscellaneous Manufacturing
- SBA small business limit
- Up to 500 employees
- Closest UK SIC
- 16290, 18110, 25990, 27900 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
This industry comprises establishments primarily engaged in manufacturing signs and related displays of all materials (except printing paper and paperboard signs, notices, displays).
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Printing advertising specialties or printing paper and paperboard signs, notices, and displays are classified in Industry 32311, Printing.
- Manufacturing and printing advertising specialties are classified in the Manufacturing sector according to the products made.
- Manufacturing die-cut paperboard displays are classified in U.S. Industry 322299, All Other Converted Paper Product Manufacturing.
- Sign lettering and painting are classified in Industry 541890, Other Services Related to Advertising.
Activities listed under 339950
The Census index assigns these 8 activities to this code. If your business matches one, this is your code.
- Billboards manufacturing
- Displays (e.g., counter, floor, point-of-purchase) manufacturing
- Electrical signs manufacturing
- Letters for signs manufacturing
- Neon signs manufacturing
- Scoreboards manufacturing
- Signs and signboards (except paper, paperboard) manufacturing
- Traffic (e.g., highway, road, street, bridge) signs manufacturing
SBA size standard for 339950
To count as a small business for SBA loans and federal contracts under NAICS 339950, your business (including affiliates) must not exceed 500 employees. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 1629, 1811, 2220, 2599, 2790), so treat them as a starting point and check the definition.
- 16290Manufacture of other products of wood; manufacture of articles of cork, straw and plaiting materialsUK SIC
- 18110Printing of newspapersUK SIC
- 25990Manufacture of other fabricated metal products n.e.c.UK SIC
- 27900Manufacture of other electrical equipmentUK SIC
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.