Most of my Sterling Silver Stick changeable Bead Pendants come in 5 sizes, but other sizes are also available: 1", 1.5", 2", 2.5" and 3" the pictures show a general size for each. Custom sizes are available upon request. The main portion of the pendant is Sterling silver, the post and topper are 316L surgical stainless steel (nickel free). Simply unscrew one end slip away from pendant and insert bead, then put back together and screw on the end. You can use ap lier ttighten ToppeR 1/4 turn if needed. If you want to view larger pics, click on the pic of that item, it will enlarge for you.