Product description:Simplest and quickest extensions to apply High quality hair for an amazing price No glue,no damage! Instant fullness & length Material:100% synthetic Japan high temperature fiber - can straighten, c Length:about 14" 16" 18" 22"without stretching Design with hair on a wire,offers an innovative hair extension that adds length and volume to your own hair in less than one minute!! There are Multi-color For choosing, which are guaranteed to blend with your own natural or color treated hair color. Our colors are multi-faceted and will work with various shades, ash, golden or beige. Go a shade darker for a highlighted effect or a shade lighter for an Ombre look. Either way, you can't go wrong! (tips:check yourself hair color under outdoor natural light on day ,then choose hair extension color ) Due to the effect of light and monitor's brightness,there could be some slight differences between the color tone of the actual product How to measure the size correctly:Take the product out of the package and let it sag naturally as shown as below picture , and then to measure.Remark:Since the roll is manually rolled, there will be an error of 2-3 cm.