Wonderful black hard plastic bracelet studded with clear rhinestones. Domed and measuring 3/4 of an inch wide. Opening is 1 inch, and 2-1/2 inches wide at top; meant to go on over the narrowest point of the wrist bone but not for the large wristed. Some scratches to the inside as shown where I am assuming this was tested (possibly for Bakelite?) I have not tested the plastic - it may be Bakelite but I am honestly not sure.