The size standards are defined by the maximum size that a business $($and its affiliates$)$ can be to qualify as a small business based on its NAICS code$($s$)$

Size standards vary by industry and are generally based on the number of employees or annual receipts the business has over a period of time $($per year$)$

Size standards may be determined by the square footage of an organization's facility.

Small business size requirements are established by the SBA