A bottom bar for a roller blind. The bottom bar has a longitudinal body with an upper surface having a longitudinal channel that is in communication with a generally hollow interior. The channel receives the lower end of the blind fabric to which is secured a stopper to hang the longitudinal body from the fabric. The bottom bar includes one or more spacers receivable within the generally hollow interior and between the stopper and the upper surface of the longitudinal body. The spacers increase the set-off between the stopper and the upper surface of the longitudinal body, thereby lifting the elevation of the longitudinal body relative to the roller tube.