When sourcing cotton fabric, the Yarn Count (e.g., 40s, 60s, 80s) is a primary indicator of fineness; higher numbers signify a softer, more premium feel. You must also verify the Thread Count (TC) for density and the GSM (Grams per Square Meter) to ensure the weight matches your specific application, such as lightweight for shirts or heavyweight for upholstery. Additionally, check for Color Fastness (Grade 4 or above) and Shrinkage Rates (typically <3% for pre-shrunk fabrics) to guarantee long-term product stability.