Size: about 6.5cm (without key ring head) Material: opaque acrylic - A special golden moon buckle that gives you the different charms of the universe. - The back is a mirror image. - The acrylic charm is scratch-resistant, and the surface layer will be covered with a film, which can be torn open during use. - The size is measured by hand and may be slightly wrong. - The picture and the actual product may be slightly different due to the lighting when taking pictures. Please let the buyer know.