A staple cartridge can comprise a plurality of staples positioned within a cartridge body wherein the cartridge body can comprise a tissue contacting deck and a plurality of ridges extending from the tissue contacting deck. The ridges can be configured to prevent or reduce the possibility of tissue from moving relative to the staple cartridge during use. The staple cartridge can further comprise a plurality of staple cavities wherein each staple cavity can comprise an opening in the deck which is at least partially surrounded by a ridge. The ridges can comprise a uniform height or a height which varies along the length thereof. The height can vary relative to a proximal end and a distal end of the cartridge body and/or between the center of the cartridge body and the side.
