NAICS Codes with Size Determinations by NAICS:
| Code | NAICS Code's Description |
| 518210 | Data Processing, Hosting, and Related Services |
| 541199 | All Other Legal Services |
| 541219 | Other Accounting Services |
| 541330 | Engineering Services |
| 541380 | Testing Laboratories |
| 541430 | Graphic Design Services |
| 541511 | Custom Computer Programming Services |
| 541512 | Computer Systems Design Services |
| 541513 | Computer Facilities Management Services |
| 541519 | Other Computer Related Services |
| 541611 | Administrative Management and General Management Consulting Services |
| 541612 | Human Resources Consulting Services |
| 541613 | Marketing Consulting Services |
| 541614 | Process, Physical Distribution, and Logistics Consulting Services |
| 541618 | Other Management Consulting Services |
| Code | NAICS Code's Description |
| 541620 | Environmental Consulting Services |
| 541690 | Other Scientific and Technical Consulting Services |
| 541713 | Research and Development in Nanotechnology |
| 541714 | Research and Development in Biotechnology (except Nanobiotechnology) |
| 541715 | Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) |
| 541720 | Research and Development in the Social Sciences and Humanities |
| 541990 | All Other Professional, Scientific, and Technical Services |
| 561110 | Office Administrative Services |
| 561210 | Facilities Support Services |
| 561320 | Temporary Help Services |
| 561422 | Telemarketing Bureaus and Other Contact Centers |
| 561499 | All Other Business Support Services |
| 611420 | Computer Training |
| 611430 | Professional and Management Development Training |
| 611699 | All Other Miscellaneous Schools and Instruction |