The length of each of our necklaces is specified in the Details tab and indicates the total length, including the chain and pendant. Necklaces that are 18" will have a 16" and 17" stationed jump ring that gives you the option to wear it at the length that works for you. Our necklaces have a lobster clasp and a signature lab-grown diamond drop at the end of the chain. To determine how the necklace will fit, we suggest cutting a string to the length that’s specified for the piece you’re interested in and tying it around your neck to see how the length looks on you.