Question : What type wire for Swarovski Crystal Necklaces?

I want to make a Swarovski necklace and I am not sure as to what kind of wire to buy. I will be using 4, 6 and 8mm bicones and Briolettes in crystal. I know I don't want the memory wire. I want it to lay softly on the neck. Meaning to be flexable not stiff. Please be specific on what to look for when I look it up. I was told soft-flex...but not specific size to buy. Please help...Thank You|||should try using fishing wire, its really strong and you cant really see it, also very cheap, thats what my mother uses.. shes a professional jewellry designer