This study aims to determine the characteristics of silk fibers from silkworm (Bombyx mori L.) crosses from local, Japanese, Chinese & European races. This research was conducted by crossing a single cross from four races. The control variables are constant temperature, type of feed and amount of feed given. The results of this study indicate that the characterization of silk fibers obtained the highest fiber length and fiber weight data, namely in crossing Japanese Ras female with Local Race Male, namely fiber length of 1032.4 meters and fiber weight of 0.2552 grams. Whereas the best spinning yield is in crossing local race females with male Chinese race.
