If a one mile thick piece of ice the size of France melted, it would raise the level of the world's oceans by more than 9 feet.
(IF this piece of ice was entirely above sea level now, perched on top of Antarctica.)
If it were a berg, floating in the ocean, 90% would be underwater now, leaving only 10% sticking out.
When that melted, only .944 foot ocean rise would be noted.