Straight Clip-in/ Clip-on Hair Extension, Set Full Head ,7 Pieces Length:55cm Color :As Shown in Picture (May Vary by Monitor) Qty/set:A set of 7 pieces: 1 x 17 cm wide weft. 2 x15cm wide weft 2 x10cm wide weft 2 x15cm wide weft Texture :Straight,silk soft Material:100% High Quality Synthetic Fiber Weight :90g - Heat Resistant which Can be Permed, straighten,curled by iron below 300 Fahrenheit, Washed, Restyled or Shorn - A set is always enough.If you want perfect effect, you need 2 sets, Weight decides the thickness.