Product description: - Brand：SARLA - simplest and quickest extensions to apply - high quality hair for an amazing price - No glue,no damage! - instant fullness & length - large color selection - can straighten, c -material:100% synthetic Japan high temperature fiber -length:about 16" 20" 24" 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!(due to under different light the color looks different ,please check your hairself hair color under outdoor natural light on day) Du 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 asbelow picture , and then to measure. Remark: Since the roll is manually rolled, there will be an error of 2-3cm.