Features: 100% brand new. Material: Glass + Steel Pins. Blue eyes diameter: 5mm. Brown eyes diameter: 5mm. Transparent eyes diameter: 5mm. For needle felting create a small hole by stabbing socket with a felting needle or poke a hole with a sewing needle then sew eye into socket and through to the back of the head and back thought to the other eye, cover stitch with some wool. Please note that each eye will not be exactly the same because of the material, sincerely hope you will understandï¼ .