General size As your requestMaterialBrass,tin, Iron , zincalloy,gold, silver, brass ,iron ,stainless steel/iron ,Aluminum , soft PVC EtcProcessPVC injection/ Die Casting / Stamped EtcLogo crafts2D or 3D ,Embossed , engrave with color or without color ,laser ,printing , sticker , as per your request Attachment Metal split-ring ,Metal keychain..