Fastener cartridge comprising non-uniform fasteners

A surgical staple cartridge, comprising:

• a cartridge body, comprising:
• a deck comprising a first surface and a second surface, wherein a longitudinal slot is defined in the second surface, wherein the first surface is raised relative to second surface, wherein a first staple cavity defined in the first surface, and wherein a second staple cavity defined in the second surface;
• a first cavity extension of the first staple cavity extending a first height from the first surface;
• and
• a second cavity extension of the first staple cavity extending a second height from the second surface;
• a first staple removably stored in the first staple cavity;
• and
• a second staple removably stored in the second staple cavity.

A surgical staple cartridge, comprising:

• a cartridge body, comprising:
• a stepped deck comprising a base surface and a step surface;
• a first staple cavity defined in the step surface, the first staple cavity comprising a first perimeter;
• a second staple cavity defined in the base surface, the second staple cavity comprising a second perimeter;
• a first projection extending from the step surface and abutting at least a portion of first perimeter of the first staple cavity;
• and
• a second projection extending from the base surface and abutting at least a portion of the second perimeter of the second staple cavity;
• a first staple removably stored in the first staple cavity;
• and
• a second staple removably stored in the second staple cavity.