3 Quick Feats

Big Boned
Prerequisite: Human, Half-orc, Gnome, or Halfling; 1st level only
Benefit: The character is at the absolute largest size for a member of his or her race. Big Boned members of medium races are actually Large size. Big Boned members of small races are actually Medium size.
Special: A character cannot take both Big Boned and Wee Git.

Wee Git
Prerequisite: Human, Elf, Dwarf, Gnome, or Halfling; 1st level only
Benefit: The character is at the absolute smallest size for a member of his or her race. Wee git members of medium races are actually Small size. Wee Git members of small races are actually Tiny size.
Special: A character cannot take both Big Boned and Wee Git.

Size Doesn't Matter
Prerequisite: Big Boned or Wee Git, Escape Artist 10 ranks
Benefit: Characters with this feat may switch between two size categories as needs dictate. They may use Big Boned or Wee Git when it is to their advantage, or use their race's normal size when that would be advantageous.
Special: This feat does not apply to worn items such as armor or clothing that must be fitted to the appropriate size.

Notes
The genesis of these feats lie in the relative growth of dwarves and elves since the earliest days of D&D. I blame Games Workshop and their big chunky dwarf models. And half-orcs are pretty frequently portrayed as larger than man-sized nowadays. That used to be the criteria for whether or not a critter was mechanically defined as large. Listing specific races in the prerequisites is a pretty ham-handed way of preventing Large dwarves, but I couldn't think of a better way to get the job done.

Has anyone seen feats like these before? I figure with so much OGL material out there that a lot of new crunchy bits are actually re-inventions of already published mechanics.