Measurement: humidity; temperature.

CFR · 2024-01-01 · US · Title 7

The length of staple of any cotton shall be the normal length by measurement, without regard to quality or value, of a typical portion of its fibers under a relative humidity of the atmosphere of 65 percent and a temperature of 70 °F.

official document · source cfr-2024 · id 7:§ 28.301