The paper I linked also looks at other proxy sea level estimates on page 4. (judithcurry.com)
Interestingly, assuming a ballpark figure of a 1.2 mm / year groundwater base flow, unbalanced groundwater discharge could also explain the much higher sea levels estimated for the previous warm interglacial, the Eemian. (landscapesandcycles.net)
The East Antarctic Ice Sheet locks away enough water to raise sea level an estimated 53 meters (174 feet), more than any other ice sheet on the planet. (sciencedaily.com)