[3.5] Size Category Feats

[Blynkibrax]

Simple question, guys and grells,

Are there any feats that allow you to treat a character as if they are one size category smaller than they actually are, whenever it's advantageous to do so?

[Cog]

Are there any feats that allow you to treat a character as if they are one size category smaller than they actually are, whenever it's advantageous to do so?

The only time I've ever seen that ability is for the PC-ified Kobold: http://www.wizards.com/default.asp?x=dnd/we/20060420a.