When purchasing cotton grey fabric (loom-state fabric), you must prioritize Yarn Count (e.g., 21s, 32s, 40s) and Thread Count (Density), as these determine the final fabric weight and strength. Ensure the GSM (Grams per Square Meter) aligns with your end-use, whether for bedding or apparel. Additionally, verify the weaving method (Plain, Twill, or Satin) and check for low linting and high tensile strength to ensure the fabric can withstand subsequent dyeing and finishing processes without degradation.