These premium jumper wires are 7" long. They have 0.1" male header on one end and 0.1" female header on the other end. They can be installed next to each other on standard pitch 0.1" header. 40 jumper wires in 4 set of each of ten rainbow color. You can always pull the ribbon wires off to make individual jumpers, or keep them together to make neatly organized wire harnesses.