This is a Crystal Rhinestone Tiara Crown Hair Accessory for Pageants, Wedding, Bridal, Princess Queen, Royalty or Halloween wear.  It features clear / white stones and is made in a full circle.  It measures approximately 5 inches across in diameter at the base with the highest part in the middle center measuring approximately 2 1/2 inches tall.  It has four rings, for securing in place with bobby pins or some other type of clips.  I'm not sure of the exact material but guessing some type of metal alloy.  In preowned condition for display purposes, but never actually used.  Shipped with USPS Mail.