This necklace is made exactly the same way as the original TV prop was made. The Kryptonite is made from a special effects plastic called Crystal Clear 200 which is the way all special effects crystal and glass are simulated in the film industry. It is put together with the proper 7 prong bell caps and presented on an adjustable 20 to 24 inch silver plated necklace. To adjust the necklace to a smaller size open the 2 jump rings with a small pliers and using regular cutters snip the chain to what ever length you want, then re close the jump rings. Some times in shipping a jump ring may open, the necklace is not broken, just reattach the jump ring and close it back up. Ships in a poly bag, no retail packaging.