The present invention discloses a system for forming an absorbent article (1) of pad type or all-in-one type to be attached around the waist of a user. The absorbent article (1) comprises a chassis (10) having a front portion (18a) and a back portion (18c) and a longitudinal extension from a front end (16) of the front portion (18a) towards a back end (17) of the back portion (18c), the chassis (10) further comprising a crotch portion (18b) connecting the front portion (18a) to the back portion (18c), the front portion (18a) having left and right front side edges (14a, 14b), the back portion (18c) having left and right back side edges (15a, 15b). An absorbent core (13) is arranged between a top sheet (11) and a back sheet (12) of the chassis. The system further comprises at least one first add-on means (30, 32) adapted to be attached to the chassis to form an absorbent article (1) that is attachable around the waist of a user. The system is arranged such that the chassis (10) is adapted to be used for forming absorbent articles both by combining a chassis with a first add-on means (30, 32) to form an absorbent article that is attachable around the waist of a user, and by using the chassis as a pad type absorbent article.
