Nikki Sixx — The GIGANTIC Diamond Engagement Ring

EXCLUSIVE 1126_nicki_sixx_and_wife
The average size of a diamond engagement ring is reportedly 1.18 carats — but Nikki Sixx just DESTROYED the average … by dropping a SIX CARAT stone on his fiancee … our sources has learned.

Sixx popped the question to 27-year-old Courtney Bingham during a trip to St. Barts this weekend … and sources close to the couple tell us it was one helluva proposal.

We”re told the evening started with a candle-lit stroll on beach … followed by dinner in a tent littered with rose petals … and when the moment was right, Sixx whipped out the ring.

Of course, Courtney said yes … because ya know, it”s 6 CARATS … and you pretty much have to. No word on when the two plan on tying the knot.