Fits up to a 10 mm Necklace/Omega Large Open BackStamped Hallmarked 14 KTCharming, Trillion-Shaped, Polished, White Gold which has been Diamond Cut, encased in 14 KT Yellow Gold.Wear With White or Wear With YellowMeasures 20 mm x 20 mm x 20 mmWeighs approx 2.50 GramsPlease check out our other jewelry items!Necklaces other enhancer shown, are NOT includedThank YouNiceVixenGems