In case you were not aware, the weight of silk makes a big difference when purchasing items made from silk. The weight of silk is determined by taking a piece of particular silk at a measurement of one hundred yards long by forty five inches wide and obtaining its weight. The weight of silk is gauged in a measurement called momme. If the weight of the piece of silk is eighteen pounds, then the silk is considered to be 18 momme. When buying silk sheets 12-19 momme is considered to be the best weight range. Bear in mind that the heavier the momme, the more durable the silk linens will be.