NAICS 212323 size standard: Kaolin, Clay, and Ceramic and Refractory Minerals Mining
Sector 21—Mining, Quarrying, and Oil and Gas Extraction › Subsector 212—Mining (except Oil and Gas)
650 employees
average number of employees
A business whose primary industry is NAICS 212323 (Kaolin, Clay, and Ceramic and Refractory Minerals Mining) is small for SBA and federal contracting purposes if it has no more than 650 employees on average, including affiliates.
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NAICS 212323 on AwardWatchdog
Before you rely on this
- Affiliates count. SBA adds the receipts or employees of your affiliates (companies that control you, that you control, or that share common ownership or management) to yours. See 13 CFR 121.103.
- Receipts are a 5-year average. Average annual receipts are generally your total receipts over your last 5 completed fiscal years divided by 5 (13 CFR 121.104).
- Employees are a 24-month average. Employee-based standards use your average number of employees per pay period over the preceding 24 completed calendar months, counting part-time and temporary staff (13 CFR 121.106).
- The contract decides the code. For a federal contract, the contracting officer assigns one NAICS code in the solicitation, and that code’s size standard is the one that counts.
- Check officially. Use the official SBA Size Standards Tool and keep your SAM.gov registration current.
Not legal or professional advice. This is a free estimate from AwardWatchdog based on SBA’s published table. AwardWatchdog is not affiliated with SBA or the U.S. government. Only SBA can make a formal size determination.
Common questions
What is the SBA size standard for NAICS 212323?
A business whose primary industry is NAICS 212323 (Kaolin, Clay, and Ceramic and Refractory Minerals Mining) is small for SBA and federal contracting purposes if it has no more than 650 employees on average, including affiliates. The standard comes from SBA’s table at 13 CFR 121.201 (last amended effective March 17, 2023).
How are employees counted for NAICS 212323?
SBA averages the number of employees for each pay period over the preceding 24 completed calendar months, counting full-time, part-time and temporary employees, and includes affiliates (13 CFR 121.106).
Is this an official size determination?
No. This page is an estimate from AwardWatchdog based on SBA’s published table. Use the official SBA Size Standards Tool at sba.gov and only SBA can make a formal size determination.
Related codes in Mining (except Oil and Gas)
212114 Surface Coal Mining (1,250 employees) · 212115 Underground Coal Mining (1,500 employees) · 212210 Iron Ore Mining (1,400 employees) · 212220 Gold Ore and Silver Ore Mining (1,500 employees) · 212230 Copper, Nickel, Lead, and Zinc Mining (1,400 employees) · 212290 Other Metal Ore Mining (1,250 employees) · 212311 Dimension Stone Mining and Quarrying (500 employees) · 212312 Crushed and Broken Limestone Mining and Quarrying (750 employees) · 212313 Crushed and Broken Granite Mining and Quarrying (850 employees) · 212319 Other Crushed and Broken Stone Mining and Quarrying (550 employees) · 212321 Construction Sand and Gravel Mining (500 employees) · 212322 Industrial Sand Mining (750 employees)
Source: 13 CFR 121.201 (SBA table of small business size standards, eCFR current as of October 15, 2026; last amended effective March 17, 2023). See also SBA’s table of size standards.
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