These are handmade parts created using a burner and fired in an electric kiln. Size: Approximately 16mm~23.5mm, 6 pieces Photos 1-4 were taken in natural light, and the following photos were taken under fluorescent light. Please check the back side in the 9th photo. Please check the size in the 10th photo. These are handmade by an amateur, so please understand this before purchasing. I am also selling on other sites, so if the item sells elsewhere, I will delete the listing even if I have received a comment. Thank you for your understanding. I may not be able to respond to comments until late at night due to work. Thank you for your understanding. *I have dogs and cats at home. Even with precautions, there may be some hair attached. Please understand this.