When sourcing silk dresses, the primary quality indicator is the Momme (mm) weight. For high-quality dresses, look for a range between 16mm and 22mm; anything lower may be too sheer or fragile, while higher weights offer a more luxurious drape and durability. Additionally, verify the Grade of the silk, with 6A Grade being the highest international standard for raw silk fiber, ensuring minimal impurities and high tensile strength. You should also request a Burn Test report or video to confirm the material is 100% protein-based silk rather than synthetic polyester 'satin'.