A staple cartridge disclosed herein comprises a cartridge body and staples removably stored therein. The staple cartridge further comprises a longitudinal row of staple drivers movable between an unfired position and a fired position to drive the staples toward an anvil and a firing system movable toward a distal end of the cartridge body to sequentially move the staple drivers toward their fired positions. The staple drivers comprise a first staple driver comprising a first bottom drive surface and a first staple support surface wherein a first driver distance is defined between the first bottom drive surface and the first staple support surface and a second staple driver comprising a second bottom drive surface and a second staple support surface wherein a second driver distance is defined between the second bottom drive surface and the second support surface which is different than the first driver distance.
