Momme Weight – this refers to the weight of a piece of silk fabric and in a standard measurement for silk. Momme weight calculates the weight of a piece of silk that is a standard 100 yards long and 45 inches wide. The weight of the piece of fabric that size is its momme weight. A piece of silk weighing 12 pounds has a momme weight of 12. When purchasing silk bedding look for a momme weight of 12 or higher.