Max. rise in sea levels

Just for the hell of it; Murphy's law on the melting on polar ice. All of it melts including all glaciers world wide. How much would the sea levels rise?

Not much, really. Ice melts raise sea levels but only on small time scales, since the ice on land that melts and goes into the ocean to raise the sea level obviously came from the ocean in the first place, so averages on longer time scales wouldn't raise or drop that much.

Carl Sagan said that if the polar ice caps melted, the sea level would actually lower a small amount since H2O expands as it freezes and most ice is below sea level, but that was ten years ago and he didn't create the scenario of all sea and land melting at the same time.