I own several key (white chalcedony (think it is 1.25 inches), knot key in gold (1.75 inches), oval key in gold (1.25 inches), and mini heart key with diamonds on the heart (1 inch). After thinking about my collection, I started wondering about others and how they wore their keys. Which key(s) do you have? What size key do you wear most often? Would you want an additional key in a particular size? I wear my mini heart key the most often. I love the bling and the size fits well with most of my necklines.