Let's get a few things straight

The oceans are rising by about 3.1 mm / year (1993 - 2003 average). The rate is accelerating.

If the Greenland ice sheet melted entirely, sea levels would rise 7.2 meters, about 23 feet.
If the West Antarctic ice sheet melted entirely, sea levels would rise at least 5 meters.
If all Antarctic ice were to melt entirely, sea levels would rise about 63 meters.
12 % of current sea level increases are due to the melting of the Greenland and Antarctic ice sheets. 88% is due to ocean warming and other glacial melting.