An advertising display comprising: [a] at least two panels (3, 4) made of sheet material, having side projections (3a, 3b, 4a, 4b) connected thereto on hinge or folding lines performed in said panels (3, 4); [b] an expansion system for bringing said display from a flattened position to an expanded or working position, comprising at least one traction elastic band; [c] said display further comprising hooks or engaging elements for connecting said side projections (3a, 3b, 4a, 4b) with said expansion system; [d] said expansion system being mounted directly between said hooks or engaging elements of one of said side projections (3a, 4a) and said hook or engaging elements of the side projections (3b, 4b) opposite thereto, [e] said display lacking additional limiting devices defining a stop relative to the contraction travel of said elastic band, such that the end of the contraction travel of said elastic band is defined by the reduction of the contraction force of said band during contraction, charaterized in that: [f] said expansion system comprises at least one extension element (10, 15), said at least one extension element (10, 15) comprising coupling means (11, 16) for said elastic band at one end and connecting means (12, 17) at the other end thereof for connecting to said side projections (3a, 3b, 4a, 4b) of said display and [g] said extension element (10, 15) comprises a plurality of coupling means (11, 16) for said elastic band, located at different points of said extension element (10, 15) for defining different lengths of said expansion system. [a] at least two panels (3, 4) made of sheet material, having side projections (3a, 3b, 4a, 4b) connected thereto on hinge or folding lines performed in said panels (3, 4); [b] an expansion system for bringing said display from a flattened position to an expanded or working position, comprising at least one traction elastic band; [c] said display further comprising hooks or engaging elements for connecting said side projections (3a, 3b, 4a, 4b) with said expansion system; [d] said expansion system being mounted directly between said hooks or engaging elements of one of said side projections (3a, 4a) and said hook or engaging elements of the side projections (3b, 4b) opposite thereto, [e] said display lacking additional limiting devices defining a stop relative to the contraction travel of said elastic band, such that the end of the contraction travel of said elastic band is defined by the reduction of the contraction force of said band during contraction, charaterized in that: [f] said expansion system comprises at least one extension element (10, 15), said at least one extension element (10, 15) comprising coupling means (11, 16) for said elastic band at one end and connecting means (12, 17) at the other end thereof for connecting to said side projections (3a, 3b, 4a, 4b) of said display and [g] said extension element (10, 15) comprises a plurality of coupling means (11, 16) for said elastic band, located at different points of said extension element (10, 15) for defining different lengths of said expansion system. [f] said expansion system comprises at least one extension element (10, 15), said at least one extension element (10, 15) comprising coupling means (11, 16) for said elastic band at one end and connecting means (12, 17) at the other end thereof for connecting to said side projections (3a, 3b, 4a, 4b) of said display and [g] said extension element (10, 15) comprises a plurality of coupling means (11, 16) for said elastic band, located at different points of said extension element (10, 15) for defining different lengths of said expansion system.