A set of grass pavers for creating a paver arrangement, each of said grass pavers comprising: - a unitary body having a bottom face for contacting a ground surface and an exposed top face for visual exposure, the unitary body comprising: ∘ intersecting longitudinal members and transverse members forming an inner opening for growing grass or for receiving other material, said inner opening having an inner opening area; ∘ the longitudinal members and transverse members having respective extremities (116, 118) protruding outwardly from the inner opening, pairs of adjacent extremities forming partial openings having respective partial opening areas, said partial openings being configured to form complete openings when the grass paver is assembled with adjacent grass pavers; wherein at least one of the longitudinal members and of the transverse members (108, 110) has a recessed portion adjacent to the inner opening, the recessed portion having an upper face extending below the exposed top face of the unitary body, said recessed portion being hidden by grass or said other material when the grass paver is installed and in use in said paver arrangement; - an overall surface area delimited by the extremities of said longitudinal and transverse members; - a void surface area corresponding to a sum of the inner opening area and the partial opening areas, and - a void ratio, defined as the void surface area over the overall area, greater than 50%; characterized in that: - the longitudinal members consist of a single pair of parallel longitudinal members; - the transverse members consist of a single pair of parallel transverse members; - the pair of parallel longitudinal members and the pair of parallel transverse members thereby forming a single inner opening per paver; - the recessed portion adjacent to the inner opening is on a first one of the pair of transverse members; an additional recessed portion being on the second one of the pair of transverse member; and - the extremities of the transverse members protrude on a single one of the longitudinal members. - a unitary body having a bottom face for contacting a ground surface and an exposed top face for visual exposure, the unitary body comprising: ∘ intersecting longitudinal members and transverse members forming an inner opening for growing grass or for receiving other material, said inner opening having an inner opening area; ∘ the longitudinal members and transverse members having respective extremities (116, 118) protruding outwardly from the inner opening, pairs of adjacent extremities forming partial openings having respective partial opening areas, said partial openings being configured to form complete openings when the grass paver is assembled with adjacent grass pavers; wherein at least one of the longitudinal members and of the transverse members (108, 110) has a recessed portion adjacent to the inner opening, the recessed portion having an upper face extending below the exposed top face of the unitary body, said recessed portion being hidden by grass or said other material when the grass paver is installed and in use in said paver arrangement; ∘ intersecting longitudinal members and transverse members forming an inner opening for growing grass or for receiving other material, said inner opening having an inner opening area; ∘ the longitudinal members and transverse members having respective extremities (116, 118) protruding outwardly from the inner opening, pairs of adjacent extremities forming partial openings having respective partial opening areas, said partial openings being configured to form complete openings when the grass paver is assembled with adjacent grass pavers; - an overall surface area delimited by the extremities of said longitudinal and transverse members; - a void surface area corresponding to a sum of the inner opening area and the partial opening areas, and - a void ratio, defined as the void surface area over the overall area, greater than 50%; - the longitudinal members consist of a single pair of parallel longitudinal members; - the transverse members consist of a single pair of parallel transverse members; - the pair of parallel longitudinal members and the pair of parallel transverse members thereby forming a single inner opening per paver; - the recessed portion adjacent to the inner opening is on a first one of the pair of transverse members; an additional recessed portion being on the second one of the pair of transverse member; and - the extremities of the transverse members protrude on a single one of the longitudinal members.