The amount of bundles you will need to purchase depends on the type of hair style you will be getting, and also the length of bundles being used.We recommend for lengths 14 to 16 inches that you use 2 or more bundles, for lengths 18 to 24 you will need 3 or more bundles, for lengths 26 to 30 inches you will need 4 or more bundles, and for lengths 30 inches and over will will need 5 or more bundles.