A staple cartridge, comprising: a cartridge body, comprising: a proximal end; a distal end; a deck extending between said proximal end and said distal end; a longitudinal slot extending from said proximal end toward said distal end; staple cavities (21920a, 21920b, 21920c) defined in said deck, wherein said staple cavities are arranged in a first longitudinal row of staple cavities, a second longitudinal row of staple cavities, and a third longitudinal row of staple cavities, wherein said first longitudinal row of staple cavities is adjacent said longitudinal slot, and wherein said second longitudinal row of staple cavities is intermediate said first longitudinal row of staple cavities and said third longitudinal row of staple cavities; first staples removably stored in said first longitudinal row of staple cavities, wherein said first staples comprise a first unformed height, and wherein said first staples are comprised of wire having a first diameter; second staples removably stored in said second longitudinal row of staple cavities, wherein said second staples comprise a second unformed height, wherein said second unformed height is taller than said first unformed height, wherein said second staples are comprised of wire having a second diameter, and wherein said second diameter is smaller than said first diameter; third staples removably stored in said third longitudinal row of staple cavities, wherein said third staples comprise a third unformed height, wherein said third unformed height is taller than said second unformed height, wherein said third staples are comprised of wire having a third diameter, and wherein said third diameter is smaller than said second diameter; and staple drivers (21960a, 21960b, 21960c) configured to deform said first staples, said second staples, and said third staples to the same deformed height, wherein said first staples are configured to relax to a first post-formed height after being deformed to said deformed height, wherein said second staples are configured to relax to a second post-formed height after being deformed to said deformed height, wherein said second post-formed height is taller than said first post-formed height, wherein said third staples are configured to relax to a third post-formed height after being deformed to said deformed height, and wherein said third post-formed height is taller than said second post-formed height. a cartridge body, comprising: a proximal end; a distal end; a deck extending between said proximal end and said distal end; a longitudinal slot extending from said proximal end toward said distal end; staple cavities (21920a, 21920b, 21920c) defined in said deck, wherein said staple cavities are arranged in a first longitudinal row of staple cavities, a second longitudinal row of staple cavities, and a third longitudinal row of staple cavities, wherein said first longitudinal row of staple cavities is adjacent said longitudinal slot, and wherein said second longitudinal row of staple cavities is intermediate said first longitudinal row of staple cavities and said third longitudinal row of staple cavities; a proximal end; a distal end; a deck extending between said proximal end and said distal end; a longitudinal slot extending from said proximal end toward said distal end; staple cavities (21920a, 21920b, 21920c) defined in said deck, wherein said staple cavities are arranged in a first longitudinal row of staple cavities, a second longitudinal row of staple cavities, and a third longitudinal row of staple cavities, wherein said first longitudinal row of staple cavities is adjacent said longitudinal slot, and wherein said second longitudinal row of staple cavities is intermediate said first longitudinal row of staple cavities and said third longitudinal row of staple cavities; first staples removably stored in said first longitudinal row of staple cavities, wherein said first staples comprise a first unformed height, and wherein said first staples are comprised of wire having a first diameter; second staples removably stored in said second longitudinal row of staple cavities, wherein said second staples comprise a second unformed height, wherein said second unformed height is taller than said first unformed height, wherein said second staples are comprised of wire having a second diameter, and wherein said second diameter is smaller than said first diameter; third staples removably stored in said third longitudinal row of staple cavities, wherein said third staples comprise a third unformed height, wherein said third unformed height is taller than said second unformed height, wherein said third staples are comprised of wire having a third diameter, and wherein said third diameter is smaller than said second diameter; and staple drivers (21960a, 21960b, 21960c) configured to deform said first staples, said second staples, and said third staples to the same deformed height, wherein said first staples are configured to relax to a first post-formed height after being deformed to said deformed height, wherein said second staples are configured to relax to a second post-formed height after being deformed to said deformed height, wherein said second post-formed height is taller than said first post-formed height, wherein said third staples are configured to relax to a third post-formed height after being deformed to said deformed height, and wherein said third post-formed height is taller than said second post-formed height.