Specifications： Material: Remy Human Hair Hair Density: 130% Length: 8"-14" Hair Topper Colour: Total 2 colors for option Longevity: 8-12 months with proper case and maintenance Texture: Straight (can be heat-styled with a flat iron or curling iron) Base size: 4"x4" (10cm*11cm diamond net+silk top , suitable for the Mild and moderate hair loss,the topper will cover just a limited space of the crown) How to choose the hair topper? 1. 4"x4" base for beginning-small/medium base of hair loss --This small base topper specially designed for beginning-small base of hair loss. It will work out great if your bald spot on top is not so severe. 2. Less back cover --This topper mainly cover the top and side,less focus on the back.So it may not fit you if you need a back cover. [If you want to cover more, we suggest that you can buy a topper with a larger base size in the link below.]