Tiny brass compass charm on a loop so you can easily slide it onto your favorite necklace. Size: .5" W compass 14kt gold filled loop size inner opening: 5.3 x 3.2mm (0.209" x 0.126") Keep dry as water can get trapped under the glass The loop is just under a quarter of an inch longways. This will slide over the end of most chains. The loop is an openable jump ring so it can be opened and closed with pliers in case you want to add it to a specific link on a chain.