[ThePythonicCow]

Smaller diameter means stronger gravity, but faster spinning, hence more centrifugal force, hence less weight.

[samtheman]

I just looked at your FR homepage. Very interesting. You are quite the pythonic person.

:)

[ShadowAce]

Diameter does not affect gravity--only the mass of the body. A smaller earth with the same mass as today's earth would have the same gravity.

The centripetal force of a faster rotating planet would be different, though, and thus affect any weight we would feel.