A Chip Off the Old Block
Larsen C just set off for an independent career as an iceberg. Its mass is estimated at a trillion tons. It was already floating, so it won't raise ocean levels, but how much would that much ice have raised the global oceans if it had been land based, or if it is replaced by ice now on land?
The global ocean has an area of 362 trillions square meters, so Larsen C amounts to 1/362 tons per square meter, or a bit more than 2.5 mm of height increase (if it weren't already floating, but it was). Anyway, it's a bunch of ice.