A minimalist pedalboard
It seems that guitarists have varying definitions of "small" pedal boards. For many, any board with less than a half-dozen or so pedals is considered "small". Seeing that my "large" (19 by 8 inch) board has three pedals (although to be fair, they're all double pedals for a total of six effects), it shouldn't be surprising that my "small" board is what one might consider "minimalist" in a strict sense.
This is a 10- by 7-inch board with only two pedals: a compressor and a delay. I find this very useful for when I don't know what to expect in a jamming situation. Limiting the choices really helps me to focus on playing rather than on selecting an appropriate effect. The two pedals give me all the "sweetener" I really need for just about anything.