The initial locking process takes about 2/3 as long as getting extensions of comparable size. Other factors that will affect the length of the initial locking session are your hair length, density, condition, size of your head and lock size desired. You should allow 2 days for the initial locking process, possibly more depending on the length and density of your hair. The beauty of Sisterlocks is that maintaining them through regular tightenings as your hair grows is extremely simple, since there are no extentions to remove and re-set.