McDonald's offering "Bling Mac" ring as part of contest

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(CNN) -- If your partner loves their Big Macs - then they're really going to want this.

Courtesy McDonald's

McDonald's is giving away a Big Mac beauty.

It's a seven-layer, stackable ring called the "Bling-Mac," and Cosmo reports it's worth upwards of $12,000 dollars.

But McDonald's is giving the 18 karat gold, gem-encrusted version of it's classic sandwich away for free.

For a chance to win it, social media users must tweet out their love for the Big Mac, using the #blingmaccontest.

Mcdonald's tongue-in-cheek promotion comes with the launch of three different Big Mac sizes: Grand Big Mac, Big Mac, and Mac Junior.