This pendant is "Baby" size (8mm). you can see the comparison in the last photo. I'm selling the small one here. The big one is approx. 14mm. I'm also selling it in my closet. This is a demi fine necklace. Regular MM products are 18k Gold Plated over brass but this item is 24k over silver. The back side of the pendant says "926" which means they used sterling silver. 24k Gold Plated Sterling Silver Adjustable Length: 14.5" to 16.5" Pendant: 0.4" x 0.4" (8mm) Lobster clasp