This peridot Gemstone cross pendant has 5 Marquise Cut Peridot Gemstones Shared Prong set for a total of 0.75tcw. It measures 23.7mm in length and 13.6mm in Width. The measurements are included with bail and the bail is big enough to switch out chains. I currently have this available on an 18" 14kt white gold curb chain that is 1.5mm. The chain is optional and it has a nice thick lobster clasp. Right not we only have this available in 14kt white gold but if you would like another metal or gemstone, please call/text (630)355-RING.