It’s “Ocean’s Eleven,” Manhattan-style.

Three sophisticated thieves made off with $500,000 worth of baubles after an elaborate Christmas Day break-in at a Manhattan diamond store, police sources said.

The crafty crooks entered through the roof at Ultra Diamond on Sixth Avenue at 23rd Street in the Flatiron District at around 5 p.m., broke through a wall and disabled cameras.

They then smashed glass showcases and took gold wedding bands, watches and diamond rings.