These are handmade parts created using a burner and then fired in an electric kiln. Size: Approximately 12mm~21mm, 13 pieces Photos 1-4 were taken in natural light only, and photos 5 onwards were taken under fluorescent light. Please check the back side in photo 9. Please check the size in photo 10. These are handmade by an amateur, so please understand this before purchasing. I am also selling on other sites, so if an item sells elsewhere, I will delete it 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, so please understand this.