1)Length: 18"(45cm)-32"(80cm) 2)Quantity: 100 strands 3)Weight: 100g (1g/s) 4)Texture: Straight 5)The hair we sell is made of 100% Natural Human Hair 6)AAAA+ High quality, tangle free, silky soft The weight is the most important factor. Weight and Length decides the thickness. Usually, a full head needs at least 100g hair. Also please contact us if the I-tip hair falls or the hair not the same color you want when open the package,we can resend new ones or refund for the hair to you.