This earrings are handmade and painted by hand making them unique. The earring post is made of plastic. Size is approximately 0.5 in depending on model. Due to the handmade process the model might vary on color and form between the picture and the actual product. The earrings are made of clay. Some tips so your earrings could last longer: - Don't expose/leave earrings directly under the sun. - Use wipes to clean them. - Avoid contact with water. - Don't sleep or excersice with earrings.