In order to win Tressmerize in shade Jet Black, you must have dark brown to black hair. This hair system comes with 5 pieces clip in hair extensions that are double drawn thick from top to bottom, and 4×4 base hair topper great for concealing thinning on the crown or short hair in the back of the head that you’re growing out. Both the hair extensions and the hair topper are 16″ in length.